Bill’s Sales. Bill’s is a popular restaurant/bar in southwest Fort Worth, Texas. Daily sales data for Bill’s for the period from October 14 through December 8 are available in a file named BILLS9 on the CD. In the MINITAB file, SALES will be in a single column. The column labeled DAY represents the day of the week, coded as 1 = Monday, 2 = Tuesday, 3 = Wednesday, 4 = Thursday, 5 = Friday, 6 = Saturday, and 7 = Sunday. In the Excel spreadsheet sales for each day will be in a separate column. Determine whether there is a difference in Bill’s average sales on different days of the week. Use a 5% level of significance for any hypothesis tests used. State any hypotheses to be tested, the decision rule, the test statistic, and your decision. If there is a difference, on which day (or days) do sales appear to be highest? What does this suggest to the owner of Bill’s about staffing?
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