Based on a sample of 95 students, we find the sample mean time spent working per week is 45.9 hours. It is known that the population standard deviation is 3.5 hours. Test the claim that for students the population mean time spent working per week is equal to 45 hours. Use an a = 0.20 significance level. Identify the following: Round results to three decimal places. f) The critical value is (give positive only if there are two): Hint: Is sigma known or unknown? Using the alternate p-value method, one finds that we have: k) The p-value is