{"id":230947,"date":"2025-10-17T14:22:41","date_gmt":"2025-10-17T08:52:41","guid":{"rendered":"https:\/\/www.oliveboard.in\/blog\/?p=230947"},"modified":"2025-10-22T09:40:13","modified_gmt":"2025-10-22T04:10:13","slug":"correlation-and-regression-for-ssc-cgl","status":"publish","type":"post","link":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/","title":{"rendered":"Correlation and Regression SSC CGL Tier 2 Paper 2"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_77 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of content<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#1_What_is_Correlation\" >1. What is Correlation?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#2_Methods_to_Study_Correlation\" >2. Methods to Study Correlation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#3_What_is_Regression\" >3. What is Regression?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#4_Regression_Lines\" >4. Regression Lines<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#5_Multiple_Correlation\" >5. Multiple Correlation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#6_Key_Differences_Between_Correlation_and_Regression\" >6. Key Differences Between Correlation and Regression<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#Key_Takeaways\" >Key Takeaways<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#FAQs_on_Correlation_and_Regression\" >FAQs on Correlation and Regression<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>In the SSC CGL Tier 2 for <a href=\"https:\/\/www.oliveboard.in\/ssc-jso\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC JSO<\/a> paper, Correlation and Regression is an important topic under Statistics. These concepts help to understand the relationship between two or more variables, how one variable changes when another changes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-what-is-correlation\"><span class=\"ez-toc-section\" id=\"1_What_is_Correlation\"><\/span><strong>1. What is Correlation?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-definition\"><strong>Definition<\/strong><\/h3>\n\n\n\n<p>Correlation measures the degree and direction of relationship between two variables. If two variables change together either in the same or opposite direction they are said to be correlated.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong><strong>Type of Correlation<\/strong><\/strong><\/td><td><strong><strong>Direction<\/strong><\/strong><\/td><td><strong><strong>Example<\/strong><\/strong><\/td><\/tr><tr><td><strong>Positive Correlation<\/strong><\/td><td>Both variables move in the same direction.<\/td><td>Height and Weight \u2013 as height increases, weight increases.<\/td><\/tr><tr><td><strong>Negative Correlation<\/strong><\/td><td>Variables move in opposite directions.<\/td><td>Price and Demand \u2013 as price increases, demand decreases.<\/td><\/tr><tr><td><strong>Zero Correlation<\/strong><\/td><td>No relationship between variables.<\/td><td>Shoe size and intelligence.<\/td><\/tr><\/tbody><\/table><\/figure>\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 aligncenter\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/ssc-cgl-mock-test\/?ref=Contms&amp;utm_medium=Organic&amp;utm_source=Blog&amp;utm_campaign=Contms\" target=\"_blank\" rel=\"noreferrer noopener\">Attempt Free New Interface SSC CGL Tier 2 Mock test<\/a><\/div>\n<\/div>\n\n\n\n<p>Also check out <a href=\"https:\/\/www.oliveboard.in\/blog\/most-repeated-quantitative-aptitude-questions-for-ssc-cgl-tier-2\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Most Repeated Quantitative Aptitude Questions for SSC CGL Tier 2<\/strong><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-2-methods-to-study-correlation\"><span class=\"ez-toc-section\" id=\"2_Methods_to_Study_Correlation\"><\/span><strong>2. Methods to Study Correlation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-a-scatter-diagram-graphical-method\"><strong>(a) Scatter Diagram (Graphical Method)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It is a simple visual method to show correlation between two variables.<\/li>\n\n\n\n<li>Values of one variable are plotted on the X-axis and the other on the Y-axis.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong><strong><strong>Pattern<\/strong><\/strong><\/strong><\/td><td><strong><strong>Type of Correlation<\/strong><\/strong><\/td><td><strong><strong><strong>Diagram Description<\/strong><\/strong><\/strong><\/td><\/tr><tr><td>Points lie close to an upward-sloping straight line<\/td><td><strong>Positive Correlation<\/strong><\/td><td>Both variables increase together<\/td><\/tr><tr><td>Points lie close to a downward-sloping straight line<\/td><td><strong>Negative Correlation<\/strong><\/td><td>One increases, the other decreases<\/td><\/tr><tr><td>Points scattered randomly<\/td><td><strong>No Correlation<\/strong><\/td><td>No visible relationship<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-b-karl-pearson-s-coefficient-of-correlation-r\"><strong>(b) Karl Pearson\u2019s Coefficient of Correlation (r)<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"463\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.08-AM-1024x463.webp\" alt=\"\" class=\"wp-image-231246\" srcset=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.08-AM-1024x463.webp 1024w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.08-AM-768x347.webp 768w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.08-AM-1536x695.webp 1536w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.08-AM-150x68.webp 150w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.08-AM.webp 1764w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>The closer |r| is to 1, the stronger the relationship.<\/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 aligncenter\"><a class=\"wp-block-button__link has-text-align-center wp-element-button\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-cgl-tier-2-weightage-of-english-and-quant\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">Check SSC CGL Tier 2 Weightage of English and Quant<\/a><\/div>\n<\/div>\n\n\n\n<p>Also check out <a href=\"https:\/\/www.oliveboard.in\/blog\/most-repeated-english-questions-for-ssc-cgl-tier-2\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Most Repeated Quantitative Aptitude Questions for SSC CGL Tier 2<\/strong><\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-c-spearman-s-rank-correlation-r\u209b\"><strong>(c) Spearman\u2019s Rank Correlation (r\u209b)<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"594\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.40-AM-1024x594.webp\" alt=\"\" class=\"wp-image-231249\" srcset=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.40-AM-1024x594.webp 1024w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.40-AM-768x446.webp 768w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.40-AM-1536x892.webp 1536w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.40-AM-150x87.webp 150w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.35.40-AM.webp 1764w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u2192 Moderate positive correlation.<\/p>\n\n\n\n<p>Check out <a href=\"https:\/\/www.oliveboard.in\/blog\/most-repeated-reasoning-and-general-intelligence-questions-for-ssc-cgl-tier-2\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Most Repeated Reasoning Questions for SSC CGL Tier 2<\/strong><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-3-what-is-regression\"><span class=\"ez-toc-section\" id=\"3_What_is_Regression\"><\/span><strong>3. What is Regression?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-definition-0\"><strong>Definition<\/strong><\/h3>\n\n\n\n<p>Regression shows the <strong>functional relationship<\/strong> between two variables, it helps <strong>predict<\/strong> the value of one variable based on another.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong><strong>Concept<\/strong><\/strong><\/td><td><strong><strong>Explanation<\/strong><\/strong><\/td><\/tr><tr><td><strong>Dependent Variable (Y)<\/strong><\/td><td>The variable to be predicted<\/td><\/tr><tr><td><strong>Independent Variable (X)<\/strong><\/td><td>The variable used for prediction<\/td><\/tr><\/tbody><\/table><\/figure>\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 wp-element-button\" href=\"https:\/\/www.oliveboard.in\/ssc-cgl-score-calculator\/?ref-contmk-scsc\" target=\"_blank\" rel=\"noreferrer noopener\">Calculate your Score using sSC CGL Tier 1 Score Calculator<\/a><\/div>\n<\/div>\n\n\n\n<p>Check out <a href=\"https:\/\/www.oliveboard.in\/blog\/most-repeated-computer-awareness-questions-for-ssc-cgl-tier-2\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Most Repeated Computer Awareness Questions for SSC CGL Tier 2<\/strong><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-regression-lines\"><span class=\"ez-toc-section\" id=\"4_Regression_Lines\"><\/span><strong>4. Regression Lines<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"632\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.08-AM-1024x632.webp\" alt=\"\" class=\"wp-image-231250\" srcset=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.08-AM-1024x632.webp 1024w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.08-AM-768x474.webp 768w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.08-AM-1536x947.webp 1536w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.08-AM-150x93.webp 150w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.08-AM.webp 1764w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>Use:<\/strong> Regression helps in forecasting for example, predicting sales based on advertisement spend.<\/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 wp-element-button\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-cgl-tier-2-books\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">Check SSC CGL Tier 2 Books<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-5-multiple-correlation\"><span class=\"ez-toc-section\" id=\"5_Multiple_Correlation\"><\/span><strong>5. Multiple Correlation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-definition-1\"><strong>Definition<\/strong><\/h3>\n\n\n\n<p>When we study the relationship between <strong>one dependent variable<\/strong> and <strong>two or more independent variables<\/strong>, it is called <strong>multiple correlation<\/strong>.<\/p>\n\n\n\n<p>Example:<br>Predicting a student\u2019s performance (Y) based on study hours (X\u2081) and attendance (X\u2082).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"376\" src=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.18-AM-1024x376.webp\" alt=\"\" class=\"wp-image-231248\" srcset=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.18-AM-1024x376.webp 1024w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.18-AM-768x282.webp 768w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.18-AM-1536x564.webp 1536w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.18-AM-150x55.webp 150w, https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Screen-Shot-2025-10-22-at-9.36.18-AM.webp 1764w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\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 aligncenter\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-cgl-tier-2-previous-year-paper\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC CGL Tier 2 Previous Year Paper, Download Free PDF<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-6-key-differences-between-correlation-and-regression\"><span class=\"ez-toc-section\" id=\"6_Key_Differences_Between_Correlation_and_Regression\"><\/span><strong>6. Key Differences Between Correlation and Regression<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong><strong>Basis<\/strong><\/strong><\/td><td><strong><strong>Correlation<\/strong><\/strong><\/td><td><strong><strong>Regression<\/strong><\/strong><\/td><\/tr><tr><td><strong>Meaning<\/strong><\/td><td>Measures degree of relationship between variables<\/td><td>Expresses the relationship mathematically<\/td><\/tr><tr><td><strong>Purpose<\/strong><\/td><td>To find strength &amp; direction<\/td><td>To predict one variable from another<\/td><\/tr><tr><td><strong>Number of Lines<\/strong><\/td><td>One (no distinction)<\/td><td>Two (Y on X, X on Y)<\/td><\/tr><tr><td><strong>Interchangeability<\/strong><\/td><td>No dependent or independent variable<\/td><td>One variable is dependent on another<\/td><\/tr><tr><td><strong>Value Range<\/strong><\/td><td>\u22121 to +1<\/td><td>Any real value<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Check other SSC JSO related blogs:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong><strong>Blogs<\/strong><\/strong><\/td><td><strong>Blogs<\/strong><\/td><\/tr><tr><td><a href=\"https:\/\/www.oliveboard.in\/ssc-jso-mock-test\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC JSO Mock Test<\/a><\/td><td><a href=\"https:\/\/www.oliveboard.in\/blog\/ssc-jso-books\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC JSO Books<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.oliveboard.in\/blog\/ssc-jso-cutoff\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC JSO Cut Off<\/a><\/td><td><a href=\"https:\/\/www.oliveboard.in\/blog\/ssc-jso-promotion\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">SSC JSO Promotion<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-key-takeaways\"><span class=\"ez-toc-section\" id=\"Key_Takeaways\"><\/span><strong>Key Takeaways <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Below are the key takeaways:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Correlation \u2192 Measures relationship strength.<\/li>\n\n\n\n<li>Regression \u2192 Provides predictive equations.<\/li>\n\n\n\n<li>Karl Pearson\u2019s coefficient (r) and Spearman\u2019s rank (r\u209b) are most common in exams.<\/li>\n\n\n\n<li>Regression lines always pass through means (\ud835\udc4b\u0304, \ud835\udc4c\u0304).<\/li>\n\n\n\n<li>Multiple correlation deals with more than two variables.<\/li>\n\n\n\n<li>Formula shortcuts and properties are frequently asked in Paper II (Statistics).<\/li>\n<\/ul>\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 aligncenter\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.oliveboard.in\/ssc-cgl-live-test\/?ref=contmk-blogs\" target=\"_blank\" rel=\"noreferrer noopener\">Attempt SSC CGL Tier 2 Live Test Here<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs_on_Correlation_and_Regression\"><\/span><strong>FAQs on Correlation and Regression<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1760688708732\"><strong class=\"schema-faq-question\"><br\/><strong>Q1. What is the difference between correlation and regression?<\/strong><\/strong> <p class=\"schema-faq-answer\">Correlation measures the degree of relationship, while regression shows how one variable predicts another.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1760690758324\"><strong class=\"schema-faq-question\"><strong>Q2. What is the range of the correlation coefficient (r)?<\/strong><\/strong> <p class=\"schema-faq-answer\">The value of r always lies between \u22121 and +1.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1760690762106\"><strong class=\"schema-faq-question\"><strong>Q3. What is Spearman\u2019s rank correlation used for?<\/strong><\/strong> <p class=\"schema-faq-answer\">It is used when data is ranked or qualitative in nature.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1760690765871\"><strong class=\"schema-faq-question\"><strong>Q4. What are regression coefficients?<\/strong><\/strong> <p class=\"schema-faq-answer\">They represent the rate of change in one variable due to a change in another variable.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1760690772272\"><strong class=\"schema-faq-question\"><strong>Q5. What does multiple correlation indicate?<\/strong><\/strong> <p class=\"schema-faq-answer\">It shows how a dependent variable is influenced by two or more independent variables.<\/p> <\/div> <\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<ul class=\"wp-block-latest-posts__list is-grid columns-3 wp-block-latest-posts\"><li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/active-passive-voice-for-ssc-exams\/\">Active and Passive Voice Questions for SSC Exams 2026, Attempt Now<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/history-notes\/\">Free History Notes PDF for SSC, Civil Services, UPSSSC &#038; Railways | Download Now<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/profit-and-loss-concept\/\">Profit and Loss for SSC, Concepts, Formulas &amp; Practice Questions<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-cgl-important-questions\/\">SSC CGL Important Questions, Solve Here<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/ssc-ancient-history\/\">SSC Ancient history, Stone Age &amp; Indus Valley Civilization, Free PDF<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/www.oliveboard.in\/blog\/geometry-triangles\/\">Geometry Triangles Notes Free Ebook for SSC Exams, Download Now<\/a><\/li>\n<\/ul>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the SSC CGL Tier 2 for SSC JSO paper, Correlation and Regression is an important topic under Statistics. These<\/p>\n","protected":false},"author":65,"featured_media":230996,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,5217,10231,63],"tags":[],"class_list":["post-230947","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","category-ssc-prep","category-ssc-railways","category-ssc-exams","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Correlation and Regression SSC CGL Tier 2 Paper 2<\/title>\n<meta name=\"description\" content=\"Learn Correlation, Regression, Spearman\u2019s rank, regression lines, and multiple correlation for SSC CGL Tier 2 with formulas, examples, and key tips.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Correlation and Regression SSC CGL Tier 2 Paper 2\" \/>\n<meta property=\"og:description\" content=\"In the SSC CGL Tier 2 for SSC JSO paper, Correlation and Regression is an important topic under Statistics. These concepts help to understand the\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/\" \/>\n<meta property=\"og:site_name\" content=\"Oliveboard\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Oliveboard\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-17T08:52:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-22T04:10:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Correlation-Linear-Regression.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"730\" \/>\n\t<meta property=\"og:image:height\" content=\"480\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Mahima Khurana\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Oliveboard\" \/>\n<meta name=\"twitter:site\" content=\"@Oliveboard\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mahima Khurana\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"NewsArticle\",\"@id\":\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/\"},\"author\":{\"name\":\"Mahima Khurana\",\"@id\":\"https:\/\/www.oliveboard.in\/blog\/#\/schema\/person\/2f25f4d24adbf225bc11e6a0a4bcad8b\"},\"headline\":\"Correlation and Regression SSC CGL Tier 2 Paper 2\",\"datePublished\":\"2025-10-17T08:52:41+00:00\",\"dateModified\":\"2025-10-22T04:10:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/\"},\"wordCount\":663,\"publisher\":{\"@id\":\"https:\/\/www.oliveboard.in\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.oliveboard.in\/blog\/wp-content\/uploads\/2025\/10\/Correlation-Linear-Regression.webp\",\"articleSection\":[\"Articles\",\"SSC\",\"SSC &amp; 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From authoring books and developing thousands of practice questions to crafting articles and study material, I specialize in transforming complex exam-related topics into clear, engaging, and accessible content. I have first hand experience of 5+ months in SSC Exams. Writing, for me, is not just a skill but a way to support and guide aspirants through their preparation journey one well-written explanation at a time."},{"@type":"Question","@id":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760688708732","position":1,"url":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760688708732","name":"Q1. What is the difference between correlation and regression?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Correlation measures the degree of relationship, while regression shows how one variable predicts another.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760690758324","position":2,"url":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760690758324","name":"Q2. What is the range of the correlation coefficient (r)?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The value of r always lies between \u22121 and +1.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760690762106","position":3,"url":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760690762106","name":"Q3. What is Spearman\u2019s rank correlation used for?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"It is used when data is ranked or qualitative in nature.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760690765871","position":4,"url":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760690765871","name":"Q4. What are regression coefficients?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"They represent the rate of change in one variable due to a change in another variable.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760690772272","position":5,"url":"https:\/\/www.oliveboard.in\/blog\/correlation-and-regression-for-ssc-cgl\/#faq-question-1760690772272","name":"Q5. What does multiple correlation indicate?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"It shows how a dependent variable is influenced by two or more independent variables.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/posts\/230947","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/users\/65"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/comments?post=230947"}],"version-history":[{"count":3,"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/posts\/230947\/revisions"}],"predecessor-version":[{"id":231251,"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/posts\/230947\/revisions\/231251"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/media\/230996"}],"wp:attachment":[{"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/media?parent=230947"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/categories?post=230947"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oliveboard.in\/blog\/wp-json\/wp\/v2\/tags?post=230947"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}