Question: The mean time required to complete an on-line course that is part of an employee training program is 40 hours. An improved web design was used with a random sample of 18 employees who completed the course in a mean time of 38 hours with a standard deviation of 4 hours. If we assume that the completion times are approximately normally distributed, does this data provide sufficient evidence to indicate that new web design reduced the time needed to complete the on-line course? Let a = 0.05. Be sure to carry out the 7-step hypothesis-testing procedure and compute the p value.