7:3 Comparing Two Population Means: Paired Difference Experiments Suppose you want to compare the mean daily sales of two restaurants located in the same city. If you were to record the restaurants' total sales for each of 12 randomly selected days during a 6-month period, the results might appear as shown in Table 7.3. Do these data pro vide evidence of a difference between the mean daily sales of the two restaurants? Table 7.3 Daily Sales for Two Restaurants Restaurant 1 Restaurant 2 Day X1 X1 1 (Wednesday) $1,005 $ 918 2 (Saturday) 2,073 1,971 3 (Tuesday) 873 825 4 (Wednesday) 1,074 999 5 (Friday) 1,932 1,827 6 (Thursday) 1,338 1,281 7 (Thursday) 1,449 1,302 8 (Monday) 759 678 9 (Friday) 1,905 1,782 10 (Monday) 693 639 11 (Saturday) 2,106 2,049 12 (Tuesday) 981 933 Data Set: RESTSALES We want to test the null hypothesis that the mean daily sales, M and M2, for the two restaurants are equal against the alternative hypothesis that they differ; that is, Ho: (M1 - 12) = 0 Ha: (M1 - 12) * 0