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
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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.