The director of manufacturing for ACME industries is interested in a computer-assisted training program that can be used to train the firm's maintenence employees for machine-repair operations. To evaluate the training method, the director of manufacturing has requested an estimate of the mean training time required with the computer assisted program. Suppose that management has agreed to train 15 employees with the new approach. The resulting sample mean training time is 53.87 days and the resulting sample standard deviation is 6.82 days. Assuming that training times are normally distributed, is there evidence in the data to conclude that the true mean training time is greater than 50? Use a = 0.05. Give the appropriate test statistic, critical value, and conclusion. The test statistic is approximately 2.2. The critical value is approximately – 1.76. The data does not suggest that the true mean training time is greater than 50 when using a = 0.05. The test statistic is approximately 2.2. The critical value is approximately 1.76. The data does suggest that the true mean training time is greater than 50 when using a = 0.05. The test statistic is approximately 2.2. The critical value is approximately 1.645. The data does suggest that the true mean training time is greater than 50 when using a = 0.05. The test statistic is approximately 2.2. The critical value is approximately 1.70. The data does suggest that the true mean training time is greater than 50 when using a = 0.05.