For a grouped data set

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

Problem

For a grouped data set, the total frequency is

\sum f_i = 50

. The sum of the products of frequency and deviation from an assumed mean

a

\sum f_i d_i = -80

and

a = 60

. Calculate the mean of the data. (a) 61.6 (b) 60 (c) 58.4 (d) 59.4