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 X?? = ?$115.41 and 11-112. It is also found that the mean and the standard deviation of the shopping expenses at the 10 Albert's stores are X2? = ?$115.27 and 52-2.39. (a) Calculate the value of the test statistic. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Test statistic (b) Calculate the critical value. (Round your answer to 2 decimal places.) Critical value (c) At the 0.05 significance level, what it the conclusion? Reject Fail to reject