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Assume that Peet's Coffee is looking at two possible locations for a new shop. To help make a decision they look at the number of pedestrians that go by each of the two locations in one- hour segments. The results of the random sample are shown in the following table. Assume the two population variances are not known but equal. Complete the steps required to test the null and alternative hypothesis at the 1% level of significance that both sites have the same number of pedestrians and calculate the 95% confidence interval. Location A Location B Mean number of pedestrians 421 347 Sample standard deviation 122 85 Number of hours sampled 35 50