A ski company in Vail owns two ski shops, one on the west side and one on

Question:

A ski company in Vail owns two ski shops, one on the west side and one on the east side of Vail. Is there a difference in daily average goggle sales between the two stores? Assume equal variances.
(a) State the hypotheses for a two-tailed test.
(b) State the decision rule for a level of significance equal to 5 percent and sketch it.
(c) Find the test statistic and state your conclusion.