Multiple choice questions 1 to test variance of two sample w

Multiple choice questions;

1/ to test variance of two sample when both samples are larger than 50 use

(e) Fisher exact test

3/ Which of the following statements is not correct :

(a) power of the test depends on population variance.

(b) unknown population variance can be estimated from a sample.

(c) Confidence intervals depends on population variance.

(c) Critical Value depends on population variance.

(c) sample size depends on population variance.

Solution

1.

Since both samples are greater than 50, then we can assume the normality. So F-test will be used. Option C is correct.

2.

t-square distribution with d1 degree of freedom is equivalent to F distribution with degree of freddom (1, d1). So option (d) is correct.

3.

Option \" Critical Value depends on population variance.\" is correct. Because critical values are specific to distibution and depends upon degree of freedom and level of significance.