Based on a sample of 70 students, we find the sample mean time spent working per week is 33 hours, with a sample standard deviation of 7 hours. We wish to test the claim that for students the population mean time spent working per week is less than 35 hours. The Claim, Opposite, Null and Alternate Hypothesis are: Claim: M 35 : Ho, (u - 35), Null Hypothesis This problem is a hypothesis test of the population mean, J. Round results to four decimal places. a) Identify the type of tail(s)? left tail right tail two tails of O O b) Find the test-statistic: c) Which Excel function should you use to find the p-value? NORM.S. DIST() T.DIST() of O O d) Find the p-value