Lesson 14 of 15Article16 min
Ch 13 — Statistics
NCERT Class 11 Statistics focuses on range, mean deviation, variance, and standard deviation for ungrouped and grouped data — how spread accompanies the mean.
Measures of dispersion
NCERT Class 11 Statistics focuses on range, mean deviation, variance, and standard deviation for ungrouped and grouped data — how spread accompanies the mean.
- Mean deviation about mean or median as in NCERT tables.
- Grouped data: use midpoints of class intervals.
Read this alongside the official NCERT chapter: Statistics — https://ncert.nic.in/textbook.php?kemh1=13-16 (full book index: https://ncert.nic.in/textbook.php?kemh1=0-16).