A marketing research firm wishes to compare the prices charged by two supermarket chains-Miller's and Albert's. The rese

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A Marketing Research Firm Wishes To Compare The Prices Charged By Two Supermarket Chains Miller S And Albert S The Rese 1 (41.02 KiB) Viewed 19 times

A marketing research firm wishes to compare the prices charged by two supermarket chains-Miller's and Albert's. The research firm, using a standardized one-week shopping plan (grocery list), makes identical purchases at 10 of each chain's stores. The stores for each chain are randomly selected, and all purchases are made during a single week. It is found that the mean and the standard deviation of the shopping expenses at the 10 Miller's stores are I1 = $124.32 and 5 = 1.13. It is also found that the mean and the standard deviation of the shopping expenses at the 10 Albert's stores are 22 = $113.86 and 52= 1.23. (a) Calculate the value of the test statistic. (Do not round intermediate calculations. Round your answer to 2 decimal places.) X Answer is complete but not entirely correct. Test statistic 19.80 X (b) Calculate the critical value. (Round your answer to 2 decimal places.) X Answer is not complete. Critical value (c) At the 0.01 significance level, what it the conclusion? Fail to reject Reject