Question

Q6.The variance of a set of data is 9. If every item is doubled then what will be the variance of the
resulting data?
(a) 9
(b) 36
(c) 18
(d) 45

Answer 1

Answer:

18

Explanation:

Let one no. be x

So, other one =x+9

if double then they would become

2x and 2x+18

*Hence the variance would become 18