How do you figure this one out?

A mail-order business prides itself on its ability to ll customers' orders in six calendar days or less on the average. Periodically, the operations manager selects a random sample of customer orders and determines the number of days required to ll the orders. Based on this sample information, he decides if the desired standard is not being met. He will assume that the average number of days to ll customers' orders is six or less unless the data suggest strongly otherwise. Establish the appropriate null and alternative hypotheses. H0: u a 6days HA: p. 6 days 0 H0: u > 6 clays HA:|.1 5 6 days 0 H0: u =6 clays HA:|.1 =2 6 days