## 13.1 | Unequal Variances t-Test

When comparing two population means, you need to first run an F-test to determine whether or not the population variances can be considered equal. If the results of that F-test of variances leads you to reject the null hypothesis, then you can assume the population variances differ. This t-test is the follow-up step where you can then compare the two population means (unequal variances assumed).