For a set of observations

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

Problem

For a set of

8

observations, the sums

\sum x_i = 120

and

\sum x_i^{2} = 1940

are given. Calculate the standard deviation (rounded to one decimal place). (a) 17.5 (b) 4.2 (c) 4.5 (d) 7.2