{"id":9746,"date":"2018-02-13T16:12:35","date_gmt":"2018-02-13T10:42:35","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=9746"},"modified":"2018-03-19T14:26:19","modified_gmt":"2018-03-19T08:56:19","slug":"statistics-class-9-notes-mathematics","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/statistics-class-9-notes-mathematics\/","title":{"rendered":"Statistics class 9 Notes Mathematics"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 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 Contents<\/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' ><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/statistics-class-9-notes-mathematics\/#CBSE_Guide_Statistics_class_9_Notes\" >CBSE Guide Statistics class 9 Notes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/statistics-class-9-notes-mathematics\/#9_Mathematics_notes_Chapter_14_Statistics\" >9 Mathematics notes Chapter 14 Statistics<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/statistics-class-9-notes-mathematics\/#Download_Revision_Notes_as_PDF\" >Download Revision Notes as PDF<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/statistics-class-9-notes-mathematics\/#Statistics_class_9_Notes\" >Statistics class 9 Notes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/statistics-class-9-notes-mathematics\/#CBSE_Class-9_Revision_Notes_and_Key_Points\" >CBSE Class-9 Revision Notes and Key Points<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p>CBSE class 9 Mathematics Chapter 14 Statistics notes in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Statistics class 9 Notes latest chapter wise notes for quick preparation of CBSE board exams and school based annual examinations. Class 9 Mathematics notes on Chapter 14 Statistics are also available for download in CBSE Guide website.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Guide_Statistics_class_9_Notes\"><\/span>CBSE Guide Statistics class 9 Notes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>CBSE guide notes are the comprehensive notes which covers the latest syllabus of CBSE and NCERT. It includes all the topics given in NCERT class 9 Mathematics text book. Users can download CBSE guide quick revision notes from myCBSEguide mobile app and my CBSE guide website.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"9_Mathematics_notes_Chapter_14_Statistics\"><\/span>9 Mathematics notes Chapter 14 Statistics<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Download CBSE class 9th revision notes for Chapter 14 Statistics in PDF format for free. Download revision notes for Statistics class 9 Notes and score high in exams. These are the Statistics class 9 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the best tips recommended by teachers during exam days.<\/p>\n<h1 style=\"text-align: center\"><span class=\"ez-toc-section\" id=\"Download_Revision_Notes_as_PDF\"><\/span><a href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-09-mathematics\/1234\/cbse-revision-notes\/7\/\"><strong>Download Revision Notes as PDF<\/strong><\/a><span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p style=\"text-align: center\"><strong>CBSE Class 09 Mathematics<br \/>\nRevison Notes<br \/>\nCHAPTER 14<br \/>\nSTATISTICS<\/strong><\/p>\n<p><strong>1. Collection of Data <\/strong><\/p>\n<p><strong>2. Representation of Data <\/strong><\/p>\n<p><strong>3. Graphical Representation of Data <\/strong><\/p>\n<p><strong>4. Measures of Central Tendency<\/strong><\/p>\n<ul>\n<li>There are two types of data (i) Primary (ii) Secondary<\/li>\n<li>We can represent the data by (i) ungrouped and grouped frequency distribution.<\/li>\n<li>Data can also \u00a0be represented by (i) bar graph (ii) Histogram (iii) Frequency polygons<\/li>\n<li>Class mark of grouped data is <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\frac{{lower\\ limit\\; + \\;upper\\ limit}}{2}\" \/><\/span><\/span><\/li>\n<li>Measure of central tendencies are mean, median, mode.<\/li>\n<li>Mean <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?(\\overline x ) = \\frac{{sum\\;of\\,all\\;observations}}{{Total\\,no.\\;of\\;observations}}\" \/><\/span><\/span><\/li>\n<li>If \u00a0sum of \u00a0all observations is denoted by<span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\sum fixi\" \/><\/span><\/span>\u00a0 and their occurrence by <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\sum fi\" \/><\/span><\/span>\u00a0i.e. frequency ,\u00a0then mean is <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?(\\overline x ) =\" \/><\/span><\/span><span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\sum fixi\\div\\sum fi\" \/><\/span><\/span><\/li>\n<li>Median: Arrange the observations in ascending or descending order then if numbers of observations (n) are odd then then median is <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\frac{{n + 1}}{2}th\" \/><\/span><\/span>term.<\/li>\n<\/ul>\n<p>If no. of observations (n) are even then median is average of <span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\frac{n}{2}th\" \/><\/span><\/span>\u00a0and<span class=\"cke_widget_wrapper cke_widget_inline cke_widget_selected\"><span class=\"math-tex cke_widget_element\"><img decoding=\"async\" src=\"https:\/\/elpiscart.com\/cgi-bin\/mathtex.cgi?\\frac{n}{2} + 1th\" \/><\/span><\/span>\u00a0terms.<\/p>\n<ul>\n<li>Mode: The observation whose frequency is greatest.<\/li>\n<li>Mode = 3 median &#8211; 2 mean.<\/li>\n<\/ul>\n<p><strong>Graphical representation of data<\/strong><\/p>\n<ul>\n<li><strong>Bar graphs<\/strong> &#8211; A bar graph is a pictorial representation of the numerical data by a number of bars (rectangles) of uniform width erected horizontally or vertically with equal spacing between them. Each rectangle or bar represents only one value of the numerical data and so there are as many bars as the number of values in the numerical data, The height or length of a bar indicates on a suitable scale the corresponding value of the numerical data.<\/li>\n<li><strong>Histogram<\/strong> &#8211; A histogram or frequency histogram is a representation of a frequemcy distribution in the form of rectangles with class intervals as bases and heights proportional to corresponding frequencies such that there is no gap between any two successive rectangles.<\/li>\n<li><strong>Frequency polygon <\/strong>&#8211; A frequency polygon of a given frequency distribution is another method of representing frequency distribution graphically.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Statistics_class_9_Notes\"><\/span>Statistics class 9 Notes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>CBSE Revision notes (PDF Download) Free<\/li>\n<li>CBSE Revision notes for Class 9 Mathematics PDF<\/li>\n<li>CBSE Revision notes Class 9 Mathematics \u2013 CBSE<\/li>\n<li>CBSE Revisions notes and Key Points Class 9 Mathematics<\/li>\n<li>Summary of the NCERT books all chapters in Mathematics class 9<\/li>\n<li>Short notes for CBSE class 9th Mathematics<\/li>\n<li>Key notes and chapter summary of Mathematics class 9<\/li>\n<li>Quick revision notes for CBSE board exams<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Class-9_Revision_Notes_and_Key_Points\"><\/span><strong>CBSE Class-9 Revision Notes and Key Points<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Statistics class 9 Notes. CBSE quick revision note for Class-9 Mathematics, Chemistry, Maths, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.<\/p>\n<ul>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-09-mathematics\/1234\/cbse-revision-notes\/7\/\">Revision Notes for class-09 Mathematics<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-09-science\/1218\/cbse-revision-notes\/7\/\">Revision Notes for class-09 Science<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-09-social-science\/1895\/cbse-revision-notes\/7\/\">Revision Notes for class-09 Social Science<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-09-english-communicative\/1900\/cbse-revision-notes\/7\/\">Revision Notes for class-09 English Communicative<\/a><\/li>\n<\/ul>\n<p>To download Statistics class 9 Notes, sample paper for class 9 Mathematics, Social Science, Science, English Communicative; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n<ul>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/number-systems-class-9-notes-mathematics\/\">Number Systems class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/polynomials-class-9-notes-mathematics\/\">Polynomials class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/coordinate-geometry-class-9-notes-mathematics\/\">Coordinate Geometry class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/linear-equations-two-variables-class-9-notes-mathematics\/\">Linear Equations in Two Variables class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/introduction-euclids-geometry-class-9-notes-mathematics\/\">Introduction to Euclids Geometry class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/lines-angles-class-9-notes-mathematics\/\">Lines and Angles class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/triangles-class-9-notes-mathematics\/\">Triangles class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/quadrilaterals-class-9-notes-mathematics\/\">Quadrilaterals class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/areas-parallelograms-triangles-class-9-notes-mathematics-2\/\">Areas of Parallelograms and Triangles class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/circles-class-9-notes-mathematics\/\">Circles class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/constructions-class-9-notes-mathematics\/\">Constructions class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/herons-formula-class-9-notes-mathematics\/\">Herons Formula class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/surface-areas-volumes-class-9-notes-mathematics\/\">Surface Areas and Volumes class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/statistics-class-9-notes-mathematics\/\">Statistics class 9 Notes Mathematics<\/a><\/li>\n<li class=\"entry-title\"><a href=\"https:\/\/mycbseguide.com\/blog\/probability-class-9-notes-mathematics\/\">Probability class 9 Notes Mathematics<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>CBSE class 9 Mathematics Chapter 14 Statistics notes in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Statistics class 9 Notes latest chapter wise notes for quick preparation of CBSE board exams and school based annual examinations. Class 9 Mathematics notes on Chapter 14 Statistics &#8230; <a title=\"Statistics class 9 Notes Mathematics\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/statistics-class-9-notes-mathematics\/\" aria-label=\"More on Statistics class 9 Notes Mathematics\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":9670,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45,456],"tags":[457,150,426,240,497],"class_list":["post-9746","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cbse-class-09","category-revision-notes","tag-cbse-notes","tag-cbse-notes-and-key-points","tag-quick-revision","tag-quick-revision-notes","tag-statistics"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Statistics class 9 Notes Mathematics | myCBSEguide<\/title>\n<meta name=\"description\" content=\"Statistics class 9 Notes Mathematics chapter 14 in PDF format for free download. 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