A company wanted to try using a computer-assisted training program to train employees to complete a machine repair. Suppose management has agreed to train 15 employees using this program. The training times (in days) are known to have a Normal distribution. The sample mean is 53.87, and the sample standard deviation iss = 682. Which of the equations below would be the correct way to determine a 95% confidence interval to estimate the population mean? (53.87 Oa. 6.82 + 2.145 V15 6.82 Ob.53.87 + 1.960| V15 OC53.87 + 2.145 6.82 V15 6.82 Od 53.87 + 2.131 14

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