The completion time for a production process is believed to be normally distributed with a mean of / = 40 minutes and a standard deviation of o = 2.6 minutes. A recently appointed production team introduced new efficiencies that they claim make the completion of the process faster. To test this claim, a random sample of n = 15 production shifts were taken and the observed mean completion time was a = 39.3 minutes. a. In testing the production team's claim, select the appropriate alternative hypothesis, H1 or Ha: Of 40 Ou > 39.3 Ou + 39.3 Ou