Chapter 10 Homework i Saved 10 A national grocer's magazine reports the typical shopper spends 10.5 minutes in line waiting to check out. A sample of 28 shoppers at the local Farmer Jack's showed a mean of 9.6 minutes with a standard deviation of 2.1 minutes. 10 Is the waiting time at the local Farmer Jack's less than that reported in the national magazine? Use the 0.025 significance level. points a. What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.) Reject Ho: U = 10.5 when the test statistic is Book Print References b. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Value of the test statistic c. What is your decision regarding He? O Do not reject He O Reject He