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Does data prove significant difference in mean weekly sales?

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Sales of Newsweek magazine are compared over a five week period at four Borders outlets in the Dallas area. These data are in the file Newsweek.xls. Does the data prove a significant difference in mean weekly sales?

Please use Excel and explain your results.

Store 1 Store 2 Store 3 Store 4
102 97 89 100
106 77 91 116
105 82 75 87
115 80 106 102
112 101 94 100

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The expert determines if data proves significant differences in mean weekly sales. A complete, neat and step-by-step solution is provided in the attached file.

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