{"id":202742,"date":"2026-06-09T17:07:02","date_gmt":"2026-06-09T11:37:02","guid":{"rendered":"https:\/\/www.practicemock.com\/blog\/?p=202742"},"modified":"2026-06-09T17:07:04","modified_gmt":"2026-06-09T11:37:04","slug":"ssc-cgl-jso-statistics-paper","status":"publish","type":"post","link":"https:\/\/www.practicemock.com\/blog\/ssc-cgl-jso-statistics-paper\/","title":{"rendered":"SSC CGL JSO Statistics Paper, Important Questions &#038; Topic Wise-Weightage"},"content":{"rendered":"\n<div class=\"pm-ssc-cta\">\n  <style>\n    .pm-ssc-cta{\n      max-width:850px;\n      margin:20px auto;\n      background:linear-gradient(135deg,#2D2A7D,#194A97,#7F1ABA);\n      border-radius:22px;\n      padding:22px 26px;\n      display:flex;\n      align-items:center;\n      justify-content:space-between;\n      gap:20px;\n      box-shadow:0 10px 28px rgba(0,0,0,0.18);\n      font-family:Arial,sans-serif;\n      flex-wrap:wrap;\n    }\n\n    .pm-ssc-left{\n      display:flex;\n      align-items:center;\n      gap:14px;\n      color:#fff;\n      flex:1;\n      min-width:260px;\n    }\n\n    .pm-ssc-icon{\n      width:58px;\n      height:58px;\n      min-width:58px;\n      border-radius:50%;\n      background:rgba(255,255,255,0.16);\n      display:flex;\n      align-items:center;\n      justify-content:center;\n      font-size:28px;\n    }\n\n    .pm-ssc-text{\n      font-size:22px;\n      font-weight:800;\n      line-height:1.35;\n      color:#fff;\n    }\n\n    .pm-ssc-text span{\n      display:block;\n      font-size:15px;\n      font-weight:500;\n      opacity:0.95;\n      margin-top:5px;\n    }\n\n    .pm-ssc-btn{\n      background:#FFD84D;\n      color:#111 !important;\n      text-decoration:none;\n      padding:16px 28px;\n      border-radius:40px;\n      font-size:17px;\n      font-weight:800;\n      transition:0.25s ease;\n      white-space:nowrap;\n      box-shadow:0 8px 20px rgba(0,0,0,0.16);\n    }\n\n    .pm-ssc-btn:hover{\n      transform:translateY(-3px);\n      background:#fff;\n    }\n\n    @media(max-width:768px){\n\n      .pm-ssc-cta{\n        padding:20px;\n      }\n\n      .pm-ssc-text{\n        font-size:18px;\n      }\n\n      .pm-ssc-text span{\n        font-size:14px;\n      }\n\n      .pm-ssc-btn{\n        width:100%;\n        text-align:center;\n        box-sizing:border-box;\n      }\n    }\n  <\/style>\n\n  <div class=\"pm-ssc-left\">\n    <div class=\"pm-ssc-icon\">\ud83d\udc65<\/div>\n\n    <div class=\"pm-ssc-text\">\n      10,000+ Aspirants have used this to check their preparation level\n      <span>\n        Attempt a quick SSC CGL quiz with exam-level questions\n      <\/span>\n    <\/div>\n  <\/div>\n\n  <a class=\"pm-ssc-btn\"\n     href=\"https:\/\/www.practicemock.com\/?next=https%3A%2F%2Fs1.practicemock.com%2Fexams%2F%3Fc%3Dssccglt126%26i%3Dssc&#038;ref=15733\"\n     target=\"_blank\"\n     rel=\"noopener\">\n     Start Free SSC CGL Quiz \u2192\n  <\/a>\n<\/div>\n\n\n\n<p><\/p>\n\n\n<div class=\"yoast-breadcrumbs\"><span><span><a href=\"https:\/\/www.practicemock.com\/blog\/\">Home<\/a><\/span> \u00bb <span><a href=\"https:\/\/www.practicemock.com\/blog\/category\/ssc-cgl\/\">SSC CGL<\/a><\/span> \u00bb <span class=\"breadcrumb_last\" aria-current=\"page\">SSC CGL JSO Statistics Paper<\/span><\/span><\/div>\n\n\n<p><\/p>\n\n\n\n<p>The <strong>SSC CGL Junior Statistical Officer (JSO) Statistics Paper<\/strong> is one of the most scoring yet challenging sections of the SSC CGL Tier 2 examination. If you are aiming for the JSO post in SSC CGL 2026, understanding the statistics paper structure, important question types, topic-wise weightage, and the right preparation strategy is absolutely essential. Regularly attempting an <a href=\"https:\/\/www.practicemock.com\/ssc-cgl-test-series\/?ref=15782\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Mock Test<\/a> can help improve speed, accuracy, and familiarity with the exam pattern. This comprehensive guide covers everything you need \u2014 from the most important questions and syllabus breakdown to preparation tips and recommended books \u2014 to help you maximise your score in the JSO Statistics Paper.<\/p>\n\n\n\n<p id=\"p-rc_a1349719aa060e3d-108\"><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/practicemock.com\/ssc-cgl-test-series\/?next=https%3A%2F%2Fs1.practicemock.com%2Fexams%2F%3Fc%3Ddashboard%26i%3Dssc%26dl%3Dhttps%253A%252F%252Fwww.practicemock.com%252Fpricing%252Fmarketing%252Ffiles%252Fpdf%252Fssc-cgl-pyq-2024-tier---1-%252809-09-2024%2529-shift-1.pdf&amp;ref=12713\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Sign Up to Download Free SSC CGL Previous Year Paper<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<p id=\"p-rc_a1349719aa060e3d-108\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Key Takeaways<\/strong><\/h2>\n\n\n\n<p>Before diving in, here is a quick summary of the most important things every JSO aspirant must know:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>SSC CGL JSO Statistics Paper (Paper II, Tier 2)<\/strong> tests applied statistics and data interpretation skills at a graduate level.<\/li>\n\n\n\n<li>The paper consists of <strong>100 MCQ questions carrying 200 marks<\/strong>, with a duration of <strong>2 hours<\/strong> and a negative marking of <strong>0.5 marks per wrong answer<\/strong>.<\/li>\n\n\n\n<li><strong>Statistical Inference<\/strong> carries the highest weightage (20\u201325 marks), followed by <strong>Probability &amp; Probability Distributions<\/strong> (15\u201320 marks) and <strong>Correlation &amp; Regression<\/strong> (10\u201315 marks).<\/li>\n\n\n\n<li>Topics like <strong>Central Tendency, Sampling Theory, and Time Series<\/strong> are moderate-weightage areas that must not be ignored.<\/li>\n\n\n\n<li><strong>Conceptual clarity + numerical practice<\/strong> is the winning combination for the JSO paper \u2014 rote memorisation of formulas alone is not sufficient.<\/li>\n\n\n\n<li>Regular mock tests and previous year papers are critical for improving speed and accuracy.<\/li>\n\n\n\n<li>In SSC CGL 2026, eligibility for <strong>Statistical Investigator<\/strong> has been expanded to include graduates in AI, Data Science, Computer Science, and IT.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Download SSC CGL JSO Statistics Important Questions PDF<\/strong><\/h2>\n\n\n\n<p>Download the SSC CGL JSO Statistics Important Questions PDF to practice the most expected and high-weightage questions for the exam. The PDF covers important topics, previous year-based questions, and concept-focused practice sets to help improve accuracy and strengthen your SSC CGL Tier 2 Statistics preparation.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.practicemock.com\/ssc-cgl-test-series\/?next=https%3A%2F%2Fs1.practicemock.com%2Fexams%2F%3Fc%3Ddashboard%26i%3Dssc%26dl%3Dhttps%253A%252F%252Fwww.practicemock.com%252Fpricing%252Fmarketing%252Ffiles%252Fpdf%252Fssc-cgl-jso-statistics-paper.pdf&amp;ref=15782\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Sign up to Download free PDF<\/strong><\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>SSC CGL JSO Statistics Important Questions<\/strong><\/h2>\n\n\n\n<p>Practising important questions on high-weightage topics is the most efficient way to prepare for the JSO Statistics paper. Below are 20 carefully selected important questions covering Central Tendency, Probability, Correlation, Sampling Theory, Time Series, and Statistical Inference \u2014 set at SSC CGL Tier 2 difficulty level.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<style>\n\/* Main Quiz Container *\/\n#quiz-1 {\n  font-family: Arial, sans-serif;\n  margin: 30px 0;\n}\n\n#quiz-1 * { \n  box-sizing: border-box; \n}\n\n#quiz-1 .quiz-container {\n  max-width: 700px;\n  margin: auto;\n  padding: 20px;\n  background: #fff;\n  border-radius: 14px;\n  box-shadow: 0 6px 16px rgba(0,0,0,0.10);\n}\n\n\/* Sticky Header for Score *\/\n#quiz-1-sticky-header {\n  position: sticky;\n  top: 0;\n  z-index: 100;\n  background: #1B2A4A;\n  color: #fff;\n  padding: 12px 20px;\n  border-radius: 10px 10px 0 0;\n  display: flex;\n  justify-content: space-between;\n  align-items: center;\n  font-size: 15px;\n  font-weight: bold;\n  box-shadow: 0 2px 8px rgba(0,0,0,0.25);\n  margin: -20px -20px 20px -20px;\n}\n\n#quiz-1-score-badge {\n  background: #155724; 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\/* Dark solid green background *\/\n  border-color: #0c3815; \n  color: #ffffff; \/* White text for contrast *\/\n  font-weight: 600;\n}\n\n#quiz-1 button.wrong {\n  background: #721c24; \/* Dark solid red background *\/\n  border-color: #4a1117; \n  color: #ffffff; \/* White text for contrast *\/\n  font-weight: 600;\n}\n\n\/* Stops users from clicking again after answering *\/\n#quiz-1 button.locked { \n  pointer-events: none; \n}\n\n#quiz-1 button.correct.locked, \n#quiz-1 button.wrong.locked { \n  opacity: 1; \n}\n\n\/* Final Score Summary Box *\/\n#quiz-1 .final-summary {\n  margin-top: 36px;\n  padding: 20px;\n  border-radius: 12px;\n  background: #f5f6fa;\n  border: 2px solid #1B2A4A;\n}\n\n#quiz-1 .final-summary h3 {\n  text-align: center;\n  color: #1B2A4A;\n  margin-bottom: 20px;\n  font-size: 18px;\n}\n\n#quiz-1 .summary-row {\n  display: grid;\n  grid-template-columns: 120px 1fr 40px;\n  gap: 10px;\n  align-items: center;\n  margin-bottom: 12px;\n  font-weight: bold;\n  font-size: 13.5px;\n  color: #1B2A4A;\n}\n\n#quiz-1 .summary-bar {\n  height: 13px;\n  background: #dde1ea;\n  border-radius: 10px;\n  overflow: hidden;\n}\n\n#quiz-1 .bar-fill {\n  height: 100%;\n  width: 0%;\n  border-radius: 10px;\n  transition: width 0.5s ease;\n}\n\n\/* Progress Bar Colors *\/\n#quiz-1 .bar-attempted   { background: #1B2A4A; }\n#quiz-1 .bar-correct     { background: #155724; }\n#quiz-1 .bar-wrong       { background: #721c24; }\n#quiz-1 .bar-unattempted { background: #b0b7c3; width: 100%; }\n\n#quiz-1 .final-score {\n  text-align: center;\n  font-size: 18px;\n  margin-top: 20px;\n  padding-top: 16px;\n  border-top: 1px solid #d1d5e0;\n  color: #1B2A4A;\n}\n\n#quiz-1 .score-value {\n  font-size: 32px;\n  font-weight: 800;\n  color: #155724;\n  margin-left: 6px;\n}\n\n\/* === COMPLETION MODAL STYLES === *\/\n.completion-modal { \n  display: none; \n  position: fixed; \n  top: 0; left: 0; width: 100%; height: 100%; \n  background: rgba(0,0,0,0.75); \n  z-index: 99999; \n  align-items: center; \n  justify-content: center; \n  font-family: Arial, sans-serif; \n}\n\n.completion-modal.is-active { \n  display: flex; \n}\n\n.completion-content { \n  background: #ffffff; \n  padding: 40px 30px; \n  border-radius: 16px; \n  max-width: 450px; \n  width: 90%; \n  text-align: center; \n  box-shadow: 0 15px 40px rgba(0,0,0,0.3); \n  position: relative; \n}\n\n.completion-title {\n  color: #1B2A4A;\n  font-size: 24px;\n  font-weight: bold;\n  margin-top: 0;\n  margin-bottom: 10px;\n}\n\n.completion-score-text {\n  font-size: 18px;\n  color: #555;\n  margin-top: 20px;\n  margin-bottom: 5px;\n}\n\n.completion-score-number {\n  font-size: 54px;\n  font-weight: 900;\n  color: #155724;\n  margin: 0 0 25px 0;\n  line-height: 1;\n}\n\n.completion-message {\n  font-size: 16px;\n  color: #444;\n  line-height: 1.5;\n  margin-bottom: 30px;\n}\n\n.completion-btn {\n  display: inline-block;\n  background: #00C853;\n  color: #ffffff;\n  text-decoration: none;\n  padding: 16px 30px;\n  font-size: 17px;\n  font-weight: bold;\n  border-radius: 8px;\n  transition: background 0.2s, transform 0.1s;\n  width: 100%;\n  box-shadow: 0 4px 10px rgba(0, 200, 83, 0.3);\n}\n\n.completion-btn:hover {\n  background: #00b34a;\n  transform: translateY(-2px);\n}\n\n.completion-close {\n  position: absolute;\n  top: 15px;\n  right: 20px;\n  font-size: 24px;\n  color: #999;\n  cursor: pointer;\n  background: none;\n  border: none;\n}\n.completion-close:hover { color: #333; }\n<\/style>\n\n<div id=\"quiz-1\">\n  <div class=\"quiz-container\">\n    \n    <div id=\"quiz-1-sticky-header\">\n      <span> Statistics &#038; Math Quiz <\/span>\n      <span id=\"quiz-1-score-badge\">Score: <strong id=\"quiz-1-score-value\">0.00<\/strong><\/span>\n    <\/div>\n\n    <div id=\"questions-wrapper\">\n        \n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q1. If the mean of 5 numbers is 12 and one number is replaced by 20, the new mean becomes 14. Find the number replaced.<\/h3>\n          <button data-correct=\"false\">6<\/button>\n          <button data-correct=\"true\">8<\/button>\n          <button data-correct=\"false\">10<\/button>\n          <button data-correct=\"false\">12<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q2. For a continuous random variable X with pdf f(x) = kx\u00b2 for 0 \u2264 x \u2264 2, find k.<\/h3>\n          <button data-correct=\"false\">1<\/button>\n          <button data-correct=\"true\">3\/8<\/button>\n          <button data-correct=\"false\">2\/3<\/button>\n          <button data-correct=\"false\">1\/4<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q3. The coefficient of skewness (Karl Pearson) for a distribution with mean = 50, median = 47, and standard deviation = 4 is:<\/h3>\n          <button data-correct=\"true\">0.75<\/button>\n          <button data-correct=\"false\">0.5<\/button>\n          <button data-correct=\"false\">0.25<\/button>\n          <button data-correct=\"false\">1<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q4. If two variables X and Y have a correlation coefficient of 0.8, then the coefficient of determination is:<\/h3>\n          <button data-correct=\"true\">0.64<\/button>\n          <button data-correct=\"false\">0.80<\/button>\n          <button data-correct=\"false\">0.36<\/button>\n          <button data-correct=\"false\">0.72<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q5. If the variance of X is 16, what is the variance of 3X + 5?<\/h3>\n          <button data-correct=\"false\">16<\/button>\n          <button data-correct=\"false\">48<\/button>\n          <button data-correct=\"true\">144<\/button>\n          <button data-correct=\"false\">21<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q6. If the mean of 5 numbers is 12 and one number is replaced by 20, the new mean becomes 14. Find the number that was replaced.<\/h3>\n          <button data-correct=\"false\">6<\/button>\n          <button data-correct=\"false\">8<\/button>\n          <button data-correct=\"true\">10<\/button>\n          <button data-correct=\"false\">12<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q7. For a continuous random variable X with pdf f(x) = kx\u00b2 for 0 \u2264 x \u2264 2, find the value of k.<\/h3>\n          <button data-correct=\"false\">1<\/button>\n          <button data-correct=\"true\">3\/8<\/button>\n          <button data-correct=\"false\">2\/3<\/button>\n          <button data-correct=\"false\">1\/4<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q8. The Karl Pearson coefficient of skewness for a distribution with mean = 50, median = 47, and standard deviation = 4 is:<\/h3>\n          <button data-correct=\"true\">0.75<\/button>\n          <button data-correct=\"false\">0.5<\/button>\n          <button data-correct=\"false\">0.25<\/button>\n          <button data-correct=\"false\">1<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q9. If two variables X and Y have a correlation coefficient of 0.8, the coefficient of determination is:<\/h3>\n          <button data-correct=\"true\">0.64<\/button>\n          <button data-correct=\"false\">0.80<\/button>\n          <button data-correct=\"false\">0.36<\/button>\n          <button data-correct=\"false\">0.72<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q10. If the variance of X is 16, what is the variance of 3X + 5?<\/h3>\n          <button data-correct=\"false\">16<\/button>\n          <button data-correct=\"false\">48<\/button>\n          <button data-correct=\"true\">144<\/button>\n          <button data-correct=\"false\">21<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q11. Spearman&#8217;s rank correlation coefficient when there are tied ranks is calculated using:<\/h3>\n          <button data-correct=\"false\">Pearson correlation formula<\/button>\n          <button data-correct=\"true\">Difference of ranks formula<\/button>\n          <button data-correct=\"false\">Regression formula<\/button>\n          <button data-correct=\"false\">None of these<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q12. In a two-way ANOVA with r = 3 rows and c = 4 columns, the degrees of freedom for interaction is:<\/h3>\n          <button data-correct=\"true\">6<\/button>\n          <button data-correct=\"false\">2<\/button>\n          <button data-correct=\"false\">8<\/button>\n          <button data-correct=\"false\">1<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q13. A sample of 100 observations has a mean of 50 and SD of 10. The standard error of the mean is:<\/h3>\n          <button data-correct=\"true\">1<\/button>\n          <button data-correct=\"false\">10<\/button>\n          <button data-correct=\"false\">0.1<\/button>\n          <button data-correct=\"false\">5<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q14. For a binomial distribution with n = 10 and p = 0.5, the variance is:<\/h3>\n          <button data-correct=\"false\">2.5<\/button>\n          <button data-correct=\"true\">2.5<\/button>\n          <button data-correct=\"false\">10<\/button>\n          <button data-correct=\"false\">1<\/button>\n        <\/div>\n\n        <div class=\"question\" data-answered=\"false\">\n          <h3>Q15. If P(A) = 0.4, P(B) = 0.5, and P(A \u2229 B) = 0.2, then P(A | B) = ?<\/h3>\n          <button data-correct=\"false\">0.2<\/button>\n          <button data-correct=\"true\">0.4<\/button>\n          <button data-correct=\"false\">0.5<\/button>\n          <button data-correct=\"false\">0.6<\/button>\n        <\/div>\n\n    <\/div>\n\n    <div class=\"final-summary\">\n      <h3>Quiz Summary<\/h3>\n      \n      <div class=\"summary-row\">\n        <span>Attempted<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-attempted\" data-summary=\"attempted\"><\/div><\/div>\n        <span data-count=\"attempted\">0<\/span>\n      <\/div>\n      \n      <div class=\"summary-row\">\n        <span>Correct<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-correct\" data-summary=\"correct\"><\/div><\/div>\n        <span data-count=\"correct\">0<\/span>\n      <\/div>\n      \n      <div class=\"summary-row\">\n        <span>Wrong<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-wrong\" data-summary=\"wrong\"><\/div><\/div>\n        <span data-count=\"wrong\">0<\/span>\n      <\/div>\n      \n      <div class=\"summary-row\">\n        <span>Unattempted<\/span>\n        <div class=\"summary-bar\"><div class=\"bar-fill bar-unattempted\" data-summary=\"unattempted\"><\/div><\/div>\n        <span data-count=\"unattempted\">0<\/span>\n      <\/div>\n      \n      <div class=\"final-score\">\n        Final Score: <span class=\"score-value\" data-score>0.00<\/span>\n      <\/div>\n    <\/div>\n\n  <\/div>\n<\/div>\n\n<div class=\"completion-modal\" id=\"quiz-completion-modal\">\n  <div class=\"completion-content\">\n    <button class=\"completion-close\" onclick=\"closeCompletionModal()\">\u2716<\/button>\n    <h2 class=\"completion-title\">Quiz Completed!<\/h2>\n    \n    <div class=\"completion-score-text\">You have scored:<\/div>\n    <div class=\"completion-score-number\" id=\"final-modal-score\">0.00<\/div>\n    \n    <p class=\"completion-message\">If you want to solve more questions then click here.<\/p>\n    \n    <a href=\"https:\/\/s1.practicemock.com\/exams\/?c=ssctopicca&#038;i=ssc\" class=\"completion-btn\">Solve More Questions<\/a>\n  <\/div>\n<\/div>\n\n<script>\n\/\/ Everything is wrapped tightly inside a function so it runs safely on your webpage\n(function() {\n  \n  \/\/ 1. 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Focus maximum effort on the highest-weightage topics, while ensuring basic coverage of lower-weightage areas.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Topic<\/strong><\/td><td><strong>Expected Weightage<\/strong><\/td><\/tr><tr><td>Statistical Inference (Estimation, Hypothesis Testing, t, z, F, Chi-square tests)<\/td><td><strong>20\u201325 marks<\/strong><\/td><\/tr><tr><td>Probability &amp; Probability Distributions (Binomial, Poisson, Normal, etc.)<\/td><td><strong>15\u201320 marks<\/strong><\/td><\/tr><tr><td>Correlation &amp; Regression<\/td><td><strong>10\u201315 marks<\/strong><\/td><\/tr><tr><td>Time Series &amp; Index Numbers<\/td><td><strong>10\u201315 marks<\/strong><\/td><\/tr><tr><td>Measures of Central Tendency &amp; Dispersion<\/td><td><strong>10\u201312 marks<\/strong><\/td><\/tr><tr><td>Sampling Theory<\/td><td><strong>8\u201310 marks<\/strong><\/td><\/tr><tr><td>Moments, Skewness &amp; Kurtosis<\/td><td><strong>5\u20138 marks<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Key Insight:<\/strong> Statistical Inference alone can account for up to 25 marks \u2014 this single topic is worth more than 12% of your total score. Candidates who master hypothesis testing, standard errors, and distribution-based tests have a decisive advantage in clearing the JSO cut-off.<\/p>\n\n\n\n<p><strong>Also Read<\/strong>:<a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-salary\/\" target=\"_blank\" rel=\"noreferrer noopener\"> SSC CGL Salary 2026, Grade Pay, In Hand Salary, Job Profile and Career Growth<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>SSC CGL JSO Statistics Syllabus 2026<\/strong><\/h2>\n\n\n\n<p>The official SSC CGL JSO Statistics syllabus is structured into 12 units, each testing specific areas of statistical knowledge and application. Here is the complete topic-wise breakdown:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Unit<\/strong><\/td><td><strong>Topic<\/strong><\/td><td><strong>Key Sub-Topics<\/strong><\/td><\/tr><tr><td>1<\/td><td>Collection, Classification &amp; Presentation of Statistical Data<\/td><td>Meaning and types of data, primary vs. secondary data, frequency distributions, tabulation, diagrammatic and graphical representation<\/td><\/tr><tr><td>2<\/td><td>Measures of Central Tendency<\/td><td>Arithmetic Mean, Median, Mode, Geometric Mean, Harmonic Mean, Weighted Mean<\/td><\/tr><tr><td>3<\/td><td>Measures of Dispersion<\/td><td>Range, Quartile Deviation, Mean Deviation, Standard Deviation, Coefficient of Variation<\/td><\/tr><tr><td>4<\/td><td>Moments, Skewness &amp; Kurtosis<\/td><td>Raw and central moments, Karl Pearson&#8217;s and Bowley&#8217;s coefficients of skewness, coefficient of kurtosis, shapes of distribution<\/td><\/tr><tr><td>5<\/td><td>Correlation &amp; Regression<\/td><td>Scatter diagrams, Karl Pearson&#8217;s correlation coefficient, Spearman&#8217;s rank correlation, partial and multiple correlation, lines of regression, regression coefficients<\/td><\/tr><tr><td>6<\/td><td>Probability Theory<\/td><td>Classical, empirical, and axiomatic definitions; Addition theorem; Multiplication theorem; Conditional probability; Bayes&#8217; theorem<\/td><\/tr><tr><td>7<\/td><td>Random Variables &amp; Probability Distributions<\/td><td>Discrete and continuous random variables; Binomial, Poisson, Normal, Exponential distributions; Joint distributions<\/td><\/tr><tr><td>8<\/td><td>Sampling Theory<\/td><td>Population vs. sample; Types of sampling (SRS, stratified, systematic, cluster); Sampling errors; Sampling distributions; Central Limit Theorem<\/td><\/tr><tr><td>9<\/td><td>Statistical Inference<\/td><td>Point and interval estimation; Unbiasedness, consistency, efficiency; Testing of hypotheses; t-test, z-test, Chi-square test, F-test; Type I and Type II errors<\/td><\/tr><tr><td>10<\/td><td>Analysis of Variance (ANOVA)<\/td><td>One-way classification (CRD); Two-way classification (RBD); F-test in ANOVA<\/td><\/tr><tr><td>11<\/td><td>Time Series Analysis<\/td><td>Components of time series (trend, seasonal, cyclical, irregular); Methods to determine trend (Moving averages, least squares); Seasonal index<\/td><\/tr><tr><td>12<\/td><td>Index Numbers<\/td><td>Meaning and uses; Types (Laspeyres, Paasche, Fisher&#8217;s ideal); Construction and applications; Cost of living index; Tests of index numbers<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Note:<\/strong> All topics must be studied at the <strong>graduate-statistics level<\/strong>. Questions require application of concepts, not just formula recall. Candidates must be comfortable with derivations and practical problem-solving across all 12 units.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How to Prepare for SSC CGL JSO Statistics Paper?<\/strong><\/h2>\n\n\n\n<p>A well-structured preparation strategy is what separates high scorers from average performers in the JSO paper. Here is a detailed preparation approach:<\/p>\n\n\n\n<p><strong>Step 1: Understand the Exam Pattern and Syllabus<br><\/strong>Begin by thoroughly understanding the exam pattern, marking scheme, negative marking, and complete <a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-syllabus\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL syllabus<\/a>. Knowing the topic-wise weightage will help you prioritize important areas and create an effective study plan.<\/p>\n\n\n\n<p><strong>Step 2: Strengthen Core Concepts<\/strong><strong><br><\/strong>Focus on building conceptual clarity in topics such as Measures of Central Tendency, Dispersion, Probability, Correlation, Regression, and Statistical Inference. Understanding the underlying concepts is crucial before attempting advanced numerical problems.<\/p>\n\n\n\n<p><strong>Step 3: Focus on High-Weightage Topics<\/strong><strong><br><\/strong>Give extra attention to topics like Probability Distributions, Statistical Inference, Sampling Theory, and Correlation &amp; Regression, as these areas frequently contribute a significant number of questions in the exam.<\/p>\n\n\n\n<p><strong>Step 4: Practice Previous Year Papers and Mock Tests<\/strong><strong><br><\/strong>Solve SSC CGL JSO previous year papers regularly to understand question trends and difficulty levels. Along with PYQs, attempt full-length SSC CGL Mock Tests to improve speed, accuracy, and time management skills.<\/p>\n\n\n\n<p><strong>Step 5: Revise Formulas and Track Performance<\/strong><strong><br><\/strong>Maintain a separate formula notebook for quick revision. Regularly review important formulas, concepts, and mistakes from mock tests. Analyze your performance after every test and work on weak areas to steadily improve your score.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Best Books for SSC CGL JSO Statistics Preparation<\/strong><\/h2>\n\n\n\n<p>Choosing the right study material is critical for JSO preparation. The following books are widely recommended by toppers and coaching experts for the SSC CGL Statistics paper:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Book Title<\/strong><\/td><td><strong>Author \/ Publisher<\/strong><\/td><td><strong>Best For<\/strong><\/td><\/tr><tr><td>Fundamentals of Mathematical Statistics<\/td><td>S.C. Gupta &amp; V.K. Kapoor<\/td><td>Complete syllabus coverage, theory + numericals<\/td><\/tr><tr><td>Statistics (for Economics)<\/td><td>T.R. Jain &amp; V.K. Ohri<\/td><td>Foundational concepts and introductory topics<\/td><\/tr><tr><td>Introduction to Mathematical Statistics<\/td><td>Hogg, McKean &amp; Craig<\/td><td>Advanced topics \u2014 Inference, Distributions<\/td><\/tr><tr><td>Statistical Methods<\/td><td>S.P. Gupta<\/td><td>Practical problems, all units<\/td><\/tr><tr><td>SSC CGL JSO Previous Year Papers<\/td><td>Various Publishers<\/td><td>Exam-style practice, PYP analysis<\/td><\/tr><tr><td>Quantitative Aptitude for Competitive Examinations<\/td><td>R.S. Aggarwal<\/td><td>Data Interpretation and applied numerics<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Additional Resources:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>NCERT Statistics (Class 11 &amp; 12):<\/strong> Useful for refreshing basics of central tendency, correlation, and index numbers.<\/li>\n\n\n\n<li><strong>Online Mock Test Series:<\/strong> Platforms offering topic-wise and full-length JSO mock tests with detailed solutions are essential for timed practice.<\/li>\n\n\n\n<li><strong>Official SSC Notification &amp; Syllabus PDF:<\/strong> Always refer to the latest official <a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-notification\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL notification<\/a> to ensure you are covering the current and correct syllabus.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Common Mistakes to Avoid in SSC CGL JSO Paper<\/strong><\/h2>\n\n\n\n<p>Many candidates lose avoidable marks in the JSO paper due to preparation errors and exam-day habits. Here are the most common mistakes and how to avoid them:<\/p>\n\n\n\n<p><strong>1. Memorising Formulas Without Understanding Their Derivation:<\/strong> The JSO paper frequently tests concept application, not just formula substitution. If you memorise formulas without understanding what they represent, you will struggle with application-based and multi-step questions. Always learn the logic behind each formula.<\/p>\n\n\n\n<p><strong>2. Neglecting Low-Weightage Topics Completely:<\/strong> Topics like Moments, Skewness, and Kurtosis carry 5\u20138 marks. Skipping them entirely could cost you marks that prove decisive in a competitive cut-off. Allocate at least basic study time to every unit in the syllabus.<\/p>\n\n\n\n<p><strong>3. Ignoring Negative Marking:<\/strong> The JSO paper deducts 0.5 marks for each wrong answer. Many candidates attempt questions they are genuinely unsure about, resulting in a net negative impact on their score. Develop the discipline to skip questions where you have less than 60\u201370% confidence.<\/p>\n\n\n\n<p><strong>4. Not Practising Under Timed Conditions:<\/strong> Studying topics in an untimed environment does not translate to exam-day performance. The ability to solve complex statistical problems within 72 seconds per question requires consistent timed practice from early in your preparation.<\/p>\n\n\n\n<p><strong>5. Not Reviewing Mock Test Mistakes:<\/strong> Taking a mock test without reviewing your errors in detail is wasted practice time. Every wrong answer is a learning signal. Spend at least as much time reviewing test mistakes as you did taking the test.<\/p>\n\n\n\n<p>Check<a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-post-wise-cut-off\/\" target=\"_blank\" rel=\"noreferrer noopener\"> SSC CGL Cut-Off<\/a> to know the minimum marks required to crack the exam.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>SSC CGL JSO Statistics Preparation Tips<\/strong><\/h2>\n\n\n\n<p>Here are targeted, actionable preparation tips to help you maximise your score in the JSO Statistics paper:<\/p>\n\n\n\n<p><strong>Tip 1: Divide Your Preparation into Three Phases<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Phase 1 (Concept Building):<\/strong> Study each unit from scratch, understand theory, and solve textbook examples.<\/li>\n\n\n\n<li><strong>Phase 2 (Practice &amp; Application):<\/strong> Solve previous year papers, topic-wise questions, and attempt sectional mock tests.<\/li>\n\n\n\n<li><strong>Phase 3 (Revision &amp; Simulation):<\/strong> Take full-length timed mocks, revise your formula sheet daily, and focus on weak areas.<\/li>\n<\/ul>\n\n\n\n<p><strong>Tip 2: Strengthen the Big Three First:<\/strong> Statistical Inference, Probability Distributions, and Correlation &amp; Regression together contribute up to 50 marks. Master these before spending time on other units.<\/p>\n\n\n\n<p><strong>Tip 3: Use Visualisation for Probability &amp; Distributions:<\/strong> For probability problems and distribution-based questions, drawing probability trees or sketching distribution curves helps you approach problems systematically and avoid errors.<\/p>\n\n\n\n<p><strong>Tip 4: Learn Shortcut Methods for Central Tendency &amp; Dispersion:<\/strong> Calculation-heavy questions on mean, median, standard deviation, and coefficient of variation can be solved faster using assumed mean methods and step-deviation methods. Practise these shortcuts until they are second nature.<\/p>\n\n\n\n<p><strong>Tip 5: Attempt the SSC CGL JSO Paper with a Strategy:<\/strong> In the exam hall, scan through all questions first and categorise them by difficulty. Attempt easy and medium questions first to secure marks, and then return to harder questions. Never spend more than 2\u20133 minutes on a single question during the first pass.<\/p>\n\n\n\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/www.practicemock.com\/?next=https%3A%2F%2Fwww.practicemock.com%2Fs1pricing%2Findex.php%3Fc%3Dsscpro&amp;ref=15755\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1141\" height=\"700\" src=\"https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2025\/10\/SSC-Packages.png\" alt=\"Budget-friendly online courses for SSC, Railways, and State exams, detailing 'SSC Pro' and 'SSC Prime' features.\" class=\"wp-image-183927\"\/><\/a><\/figure><\/div>\n\n\n<p><\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong><em>Join our exclusive Telegram group for expert guidance, personalized tips, and real-time solutions to boost your SSC exam prep. [<a href=\"https:\/\/t.me\/practicemockssc\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Click here to join now!<\/a>]<\/em><\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td colspan=\"2\"><strong>Other Blogs of SSC CGL<\/strong><\/td><\/tr><tr><td><a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-notification\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Notification<\/a><\/td><td><a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-syllabus\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Syllabus<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-study-plan-2025\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Study Plan<\/a><\/td><td><a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-exam-pattern\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Exam Pattern<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-cut-off\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Cut Off<\/a><\/td><td><a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-preparation-strategy\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Preparation Strategy<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.practicemock.com\/blog\/ssc-cgl-previous-year-papers-with-solutions\/\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Previous Year Question Papers<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>FAQs on SSC CGL JSO Statistics Paper<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What is the level of the JSO Statistics paper?<\/strong><\/h3>\n\n\n\n<p>The difficulty level of the SSC CGL JSO Statistics paper is aligned with the graduation level (Bachelor&#8217;s Degree). It demands a deep understanding of applied statistics, probability, and mathematical statistics beyond simple arithmetic.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Is there a sectional cut-off for the Statistics paper?<\/strong><\/h3>\n\n\n\n<p>While SSC CGL Tier-II requires candidates to qualify in individual sections of Paper-I, Paper-II (Statistics) has an overall qualifying mark based on your category. The final merit for the JSO post is determined by combining the scores of Paper-I and Paper-II.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Are calculators allowed in the SSC CGL Tier-II exam?<\/strong><\/h3>\n\n\n\n<p>No, electronic devices, including standard and scientific calculators, are strictly prohibited inside the SSC examination hall. You must rely on mental calculation and manual approximation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How can I improve my speed for the JSO numerical questions?<\/strong><\/h3>\n\n\n\n<p>To improve speed, memorize the squares up to 50, cubes up to 20, and common fractional values. Practice approximation techniques and focus on writing out formulas mentally rather than on paper to save crucial seconds.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Which books are recommended for JSO preparation?<\/strong><\/h3>\n\n\n\n<p>The most highly recommended book is <em>Fundamentals of Mathematical Statistics<\/em> by S.C. Gupta &amp; V.K. Kapoor for building concepts. For practice, Kiran Prakashan\u2019s compilation of previous years&#8217; Statistics papers for SSC CGL is highly effective.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Explore SSC CGL JSO Statistics Paper important questions, topic-wise weightage, syllabus, preparation tips, books, and exam strategy.<\/p>\n","protected":false},"author":25,"featured_media":202743,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[16],"tags":[],"class_list":["post-202742","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ssc-cgl"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SSC CGL JSO Statistics Paper: Important Questions &amp; 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