A set of observations has and

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

Problem

A set of

20

observations has

\sum x_i = 150

and

\sum x_i^{2} = 1300

. Each observation is transformed according to

y = 3x - 2

. Determine the standard deviation of the

y

-values (rounded to one decimal place). (a)

6.9

(b)

2.9

(c)

8.9

(d)

9.1