Helene Parker Ltd. wants to determine whether two different instore promotions for its new line of skin care products will produce different levels of sales. The company has matched stores according to size and location and randomly chosen five matched pairs of stores. One store in each matched pair is randomly assigned to Promotion 1 and the other to Promotion 2. At the end of the month, product sales are reported. Using the data in the table and assuming that the necessary population conditions are satisfied, construct a hypothesis to test the null hypothesis that there is no difference in average sales for the populations represented. Use a significance level of 1%.

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New Product Sales ($000s) Store Pairs Promo 1 Promo 2 Difference (d)2 +16 +1.2 +3 +.3 3 5.6 7.6 89.2 6.0 5.8 6.0 7.2 8.95.7 2