The mid-points and corresponding frequencies of a grouped data set are as follows: :…

MATHEMATICS · Single correct · CBSE · Mathematics · Statistics · Statistics

Problem

The mid-points

x_i

and corresponding frequencies

f_i

of a grouped data set are as follows:

x_i

: 10 20 30 40

f_i

: \; 3 5 7 5 Calculate the variance of the distribution. (a)

106

(b)

101

(c)

100

(d)

110