The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes with a standard deviation of 0.5 minutes. We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.1. The test statistic is:a. 1.96b. 1.64c. 2.00d. 0.0562. The p-value is between:a. 0005 to 0.01b. 0.01 to 0.025c. 0.025 to 0.05d. 0.05 to 0.103. At 95% confidence, it can be concluded that the mean of the population is:a. Significantly greater than 3b. Not significantly greater than 3c. Significantly less than 3d. Significantly greater than 3.18