A grocery store chain has a policy that the mean time customers wait in line to begin checking out must not exceed 2 minutes. To verify the performance of a store the company measures the waiting time of 36 customers, obtaining mean time of 2.17 minutes with standard deviation 0.46 minute. If the store manager wish to test the policy, the critical value and test statistic are O a critical value: 1.6896 test statistic: 2.2174 b. critical value: 1.6449 test statistic: -22174