Question

In: Statistics and Probability

You should use a pooled t-test versus a non-pooled t-test when the samples are matched. the...

You should use a pooled t-test versus a non-pooled t-test when

the samples are matched.

the variance of the two populations are equal.

the sample sizes of both groups are the same.

None of these

the samples are matched and the sample sizes of both groups are the same.

Solutions

Expert Solution

Solution:

Answer is

the variance of the two populations are equal.

Explanation:

t test for testing the difference between two means

The hypothesis are

H0:  1 =  2

Ha : 1    2

n1 and n2 are the sample sizes.

s1 and s2 are the sample standard deviations.

There are two types

Pooled t test is used when two population variances are assumed to be equal.

Non pooled t test is used when two population variances are assumed to be unequal.

So , answer is '

the variance of the two populations are equal.

orchestra answered 2 years ago
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