Ex 15.2, 3
Find the mean and variance for the first 10 multiples of 3
First 10 multiples of 3 are
3, 6, 9, 12, 15, 18, 21, 24, 27, 30
(xi )2=74.25
Variance ( )2 = ( (xi )2 " " )/ = 742.5/10= .
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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.