Chapter 13 • Class 11 Mathematics
Statistics
Class 11 Maths Statistics — measures of dispersion: range, mean deviation, variance and standard deviation for grouped and ungrouped data.
Study by topic — one focused page each
1
Range and Mean Deviation
In Class 10 you summarised data with a single central value — mean, median or mode. But two classes can share the same average and still be wildly dif…
Start this topic → 2Variance and Standard Deviation
Mean deviation uses absolute values, which are awkward to handle algebraically. Statisticians prefer to square the deviations instead — squaring also …
Start this topic → 3Coefficient of Variation and Comparing Variability
Standard deviation tells you the spread of one data set in its own units. But suppose you want to compare the consistency of two sets that are measure…
Start this topic →Chapter-wide tests
Online Test
10 MCQ • 20 min
IMO / Olympiad Practice
Olympiad level • 20 min
📝 Full Chapter Test (Download & Print)
35 marks • 75 min • with answer key