# T-test or two-way mixed ANOVA?

I have a two-group pre-test/post-test design with one dependent variable. I want to find out whether or not an intervention has been effective. Would it be more appropriate to do a t-test on the gain scores or a two-way mixed ANOVA?

Thanks!

It's also worth noting that the means of both groups at pre-test were identical.

• Means were identical? That sounds fishy to me. – Jeremy Miles Apr 12 '16 at 18:06

It doesn't matter. These are the same test. (Try it, you'll get the same p-value, and $F$ will be equal to $t^2$.