Chapter 10.2, Problem 10E

Consider the following hypothesis test:

$\begin{array}{l}{H}_0:{\mu }_1-{\mu }_2=0\\ H_{\text{a}}:{\mu }_1-{\mu }_2\ne 0\end{array}$

The following results are from independent samples taken from two populations.

1. a. What is the value of the test statistic?
2. b. What is the degrees of freedom for the t distribution?
3. c. What is the p-value?
4. d. At α = .05, what is your conclusion?