In testing for the differences between the means of two independent populations where the variances in each population are unknown but assumed equal,the degrees of freedom is:

Question

Quizplus · Accepted Answer

The degrees of freedom for the t-test when testing differences between the means of two independent populations, assuming equal but unknown variances, is calculated as the sum of the sample sizes of both groups minus 2. This is represented by $n_1 + n_2 - 2$, which matches choice B.

In Testing for the Differences Between the Means of Two