Hello

I'm working on a homework question and I am looking for some assistance.

The question refers back to another, but I believe this is all the information below.

n = 20

variance = 1.4

let S^2 denote the sample variance of the 20 measurements

a) find b such that P(S^2 < b) = .975

b) find a such that P(a < S^2) = .975

the answers are given in the back, which are

a) 2.42

b) 0.656