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.
01Measures 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.