Read and download the Chapter 13 Statistics PDF from the official NCERT Book for Class 11 Mathematics. Updated for the 2025-26 academic session, you can access the complete Mathematics textbook in PDF format for free.
NCERT Class 11 Mathematics Chapter 13 Statistics Digital Edition
For Class 11 Mathematics, this chapter in NCERT Book Class 11 Maths Statistics Questions provides a detailed overview of important concepts. We highly recommend using this text alongside the NCERT Solutions for Class 11 Mathematics to learn the exercise questions provided at the end of the chapter.
Chapter 13 Statistics NCERT Book Class Class 11 PDF (2025-26)
15.1 Overview
In earlier classes, you have studied measures of central tendency such as mean, mode, median of ungrouped and grouped data. In addition to these measures, we often need to calculate a second type of measure called a measure of dispersion which measures the variation in the observations about the middle value– mean or median etc.
This chapter is concerned with some important measures of dispersion such as mean deviation, variance, standard deviation etc., and finally analysis of frequency distributions.
15.1.1 Measures of dispersion
(a) RangeThe measure of dispersion which is easiest to understand and easiest to calculate is the range. Range is defined as:
Range = Largest observation – Smallest observation
(b) Mean Deviation
(i) Mean deviation for ungrouped data: For n observation x1, x2, ..., xn, the mean deviation about their mean x is given by
(ii) Mean deviation for discrete frequency distribution Let the given data consist of discrete observations x1, x2, ... , xn occurring with frequencies f1, f2, ... , fn, respectively. In this case
Please refer to attached file for NCERT Class 11 Maths Statistics Questions
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Important Practice Resources for Class 11 Mathematics
NCERT Book Class 11 Mathematics Chapter 13 Statistics
Download the official NCERT Textbook for Class 11 Mathematics Chapter 13 Statistics, updated for the latest academic session. These e-books are the main textbook used by major education boards across India. All teachers and subject experts recommend the Chapter 13 Statistics NCERT e-textbook because exam papers for Class 11 are strictly based on the syllabus specified in these books. You can download the complete chapter in PDF format from here.
Download Mathematics Class 11 NCERT eBooks in English
We have provided the complete collection of NCERT books in English Medium for all subjects in Class 11. These digital textbooks are very important for students who have English as their medium of studying. Each chapter, including Chapter 13 Statistics, contains detailed explanations and a detailed list of questions at the end of the chapter. Simply click the links above to get your free Mathematics textbook PDF and start studying today.
Benefits of using NCERT Class 11 Textbooks
The Class 11 Mathematics Chapter 13 Statistics book is designed to provide a strong conceptual understanding. Students should also access NCERT Solutions and revision notes on studiestoday.com to enhance their learning experience.
You can download the latest, teacher-verified PDF for NCERT Book Class 11 Maths Statistics Questions for free on StudiesToday.com. These digital editions are updated as per 2025-26 session and are optimized for mobile reading.
Yes, our collection of Class 11 Mathematics NCERT books follow the 2026 rationalization guidelines. All deleted chapters have been removed and has latest content for you to study.
Downloading chapter-wise PDFs for Class 11 Mathematics allows for faster access, saves storage space, and makes it easier to focus in 2026 on specific topics during revision.
NCERT books are the main source for NCERT exams. By reading NCERT Book Class 11 Maths Statistics Questions line-by-line and practicing its questions, students build strong understanding to get full marks in Mathematics.