Question: A study is performed in a large southern town to determine whether the average weekly grocery bill per four-person family in the town is significantly different from the national average. A random sample of the weekly grocery bills of four-person families in this town is given in the worksheet Groceries in the Excel workbook 10F_Exam2.xls, which can be found in the Exams Folder in the course WebCT site.

1. Assume that the national average weekly grocery bill for a four-person family is $100. Conduct an appropriate test of hypothesis to determine whether the average weekly grocery bill per four-person family in this town differs from the national average. Use a significance level of  = .05. Clearly indicate the alternatives, test statistic, decision rule, and your conclusion in the space below . (10pts)

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