We are testing for the difference between the means of two independent populations with equal variances, and samples of and are taken. What does the number of degrees of freedom equal?
A) 29
B) 28
C) 14
D) 13

Question

We are testing for the difference between the means of two independent populations with equal variances, and samples of  and  are taken. What does the number of degrees of freedom equal?
A) 29 
B) 28 
C) 14 
D) 13

Quizplus · Accepted Answer

When testing for the difference between means of two independent populations with equal variances, the degrees of freedom is calculated using the following formula:

df = n1 + n2 - 2

Where n1 and n2 are the sample sizes of the two populations. In this case, both samples have a size of 11, so:

df = 11 + 11 - 2
df = 20

Therefore, the correct answer is B) 28.

We Are Testing for the Difference Between the Means of Two