The table shows the prices of identical groceries at 7-Eleven and at Vons.
a. Test the hypothesis that the mean price at 7-Eleven is more than the mean price at Vons, at the 0.05 level. Assume that the sampling is random and the samples are Normal.
b. Although a two-sample t-test is not appropriate for this data set, do it anyway to see what happens.
c. Compare the results and explain.

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Prices 1 gal Milk 12 Eggs Sliced ham (6 oz) Coke (12-pack) Campbell's soup Half gal Milk Cheerios (15 oz) Cheezit (10 oz) 7-Eleven 3.29 1.89 2.89 3.69 119 1.99 3.49 2.89 Vons 2.99 2.19 2.28 3.33 1.19 1.83 3.35 2.29