Question

If you have samples of
n 1 equals 18
n1=18 and
n 2 equals 22
n2=22​, in performing the​ pooled-variance t​ test, how many degrees of freedom do you​ have?

Answer 1

$$df=n_1+n_2-2$$

$$18+22-2=38$$

Answer: the degrees of freedom are 38