Is there a difference in the average number of years' seniority between returning part-time seasonal employees and returning full-time seasonal employees at a Vail Resorts' ski mountain? From a random sample of 191 returning part-time employees, the average seniority, 1, was 4.9 years with a standard deviation, s1, equal to 5.4 years. From a random sample of 833 returning full-time employees, the average seniority, 2, was 7.9 years with a standard deviation, s2, equal to 8.3 years. Assume the population variances are not equal.
(a) Test the hypothesis of equal means using 5 .01.
(b) Calculate the p-value using Excel.