a. The Philadelphia office of Price Waterhouse Coopers LLP hired five accounting trainees this year. Their monthly starting salaries were: $3173, $3559, $3449, $3128 and S3625. Compute the population variance and standard deviation (4) 11. i. The Pittsburgh office hired six trainees. Their mean monthly salary was $3550 and the standard deviation was $300. Compare two groups. (1) b. The age of some students are: 3, 13, 7, 5, 21, 23, 23, 40, 23, 14, 12, 56, 32, 45, 9, 13, 32, 26, 24 and 31. Calculate their median age. (2.5) c. Classify the following variables on the basis of measurement scale: IELTS score, Price of a commodity, Performance of an employee, weight of a student. (2)