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Please solve A marketing research firm whishes to compare the prices charged by 2 supermarket chains - Publi's and Wally's . The research firm using

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A marketing research firm whishes to compare the prices charged by 2 supermarket chains - Publi's and Wally's . The research firm using a standardized one-week shopping plan (grocery lists, makes identical purchases at 100 of each chain's stores. The stores for each chain are randomly selected, and all purchases are made during a single week. It is reasonable to assume that the samples are independent. Weeky Expenses Publi's Average Weekly Expenses of the 100stores $120.97 Sample Variance $3.73 Wally's Average Weekly Expenses of the 100 stores $115.03 Sample Variance $4.47 What is the value of the test statistic (to 4 decimals)

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