Ex 13.2, 7 - Chapter 13 Class 11 Statistics

Last updated at July 24, 2026 by

Ex 13.2, 7 - Find mean and variance for frequency distribution - Ex 13.2

part 2 - Ex 13.2, 7 - Ex 13.2 - Serial order wise - Chapter 13 Class 11 Statistics

Remove Ads

Transcript

Ex15.2, 7 Find the mean and variance for the following frequency distribution. ( )^2 = 68280 N = = 30 Variance (" " ^2) = 1/ ( )^2 = 1/30 68280 = 2276

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.