Commute times in the u. s. are heavily skewed to the right. we select a random sample of 200 people from the 2000 u. s. census who reported a non-zero commute time. in this sample the mean commute time is 27.5 minutes with a standard deviation of 18.9 minutes. can we conclude from this data that the mean commute time in the u. s. is less than half an hour? conduct a hypothesis test at the 5% level of significance. what is the p -value for this hypothesis test?