Hely 8 Check my w A marketing research firm wishes to compare the prices charged by two supermarket chans-Milier's and Albert's The research fem, using a standardized one week shopping plan grocery s makes identical purchases at 10 of each chan's stores. The stores for each chain are randomly selected, and all purchases are made during a single weck it is found that the mean and the standard deviation of the shopping expenses at the 10 Miller's stores are $12192 and 51.40, respectively. It is also found that the mean and the standard deviation of the shopping expenses at the 10 Albert's stores are $14.81 and 5184, respectively. Assuming normality test to see if the corresponding population variances differ by setting aequal to 05. Is it reasonable to use the equal variances procedure to compare population means? eBook (a) Calculate the value of the test statistic (Do not round intermediate calculations. Round your answer to 2 decimal places) Print erences Test statistic (b) Calculate the critical value. (Round your answer to 2 decimal places.) Critical value