Discussion:
Kruskall-Wallis Test
Q: 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.
|
COURSE
|
SUPERVISORY SKILLS RANK
|
|
1
|
3
|
14
|
10
|
12
|
13
|
|
2
|
2
|
7
|
1
|
5
|
11
|
|
3
|
19
|
16
|
9
|
18
|
17
|
|
4
|
20
|
4
|
15
|
6
|
8
|
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.