Question

sample of 45 bottles of soft drink showed a variance of 1.1 in their contents. The process engineer wants to determine whether or not the standard deviation of the population is significantly different from 0.9 ounces. Using a significance level of 0.01, what are the critical values of the test

Answer 1

The correct solution is "23.58 and 71.89".

Explanation:

Given:

Sample,

n = 45

df = 45 - 1

= 44

then,

⇒
`X_R^2 = X_{(\alpha)/(2),df }^2`

`=71.89`

or,

⇒
`X_L^2 = X_{1-(\alpha)/(2), df }^2`

`=23.58`