Hypothesis testing

19. Samples of starting annual salaries for individuals entering

the public accounting and financial planning professions

follow ( Fortune, June 26, 1995). Annual salaries are shown

in thousands of dollars.

Pubic Accountant Financial Public Accountant Financial

Planner Planner

25.2 24.0 30.0 28.6

33.8 24.2 25.9 24.7

31.3 28.1 34.5 28.9

33.2 30.9 31.7 26.8

29.2 26.9 26.9 23.9

a. Using a .05 level of significance, test the hypothesis that

there is no difference between the starting annual salaries

of public accountants and financial planners. What is your

conclusion?

b. What are the sample mean annual salaries for the two

professions?

30. A large corporation has been sending many of its first-level

managers to an off-site supervisory skills course. Four

different management development centers offer this

course, and the corporation wants to determine whether

they differ in the quality of training provided. A sample of 20

employees who have attended these programs has been

chosen and the employees ranked in terms of supervisory

skills. The results follow.

Note that the top-ranked supervisor attended course 2 and

the lowest-ranked supervisor attended course 4. Use α = .05

and test to see whether there is a significant difference in

the training provided by the four programs.