A large corporation sends many of its first-level managers to an off-site supervisory skills training course. Four different management development centers offer this course. The director of human resources would like to know whether there is a difference among the quality of training provided at the four centers. An independent random sample of five employees was chosen from each training center. The employees were then ranked 1 to 20 in terms of supervisory skills. A rank of 1 was assigned to the employee with the best supervisory skills. Suppose the ranks are as shown.
Course | |||
---|---|---|---|
A | B | C | D |
5 | 4 | 19 | 18 |
13 | 9 | 17 | 3 |
7 | 1 | 10 | 14 |
15 | 2 | 20 | 8 |
11 | 12 | 16 | 6 |
Use α = 0.05 and test whether there is a significant difference among the quality of training provided by the four programs.
State the null and alternative hypotheses.
H0: MedianA = MedianB
= MedianC = MedianD
Ha: MedianA ≠ MedianB ≠
MedianC ≠ MedianDH0:
There is no difference in the quality of the training for the
programs.
Ha: There is a difference in the quality of the
training for the
programs. H0:
MedianA = MedianB = MedianC =
MedianD
Ha: MedianA > MedianB
< MedianC >
MedianDH0: There is a difference in
the quality of the training for the programs.
Ha: There is no difference in the quality of
the training for the programs.H0:
MedianA ≠ MedianB ≠ MedianC ≠
MedianD
Ha: MedianA = MedianB =
MedianC = MedianD
Find the value of the test statistic. (Round your answer to two decimal places.)
Find the p-value. (Round your answer to three decimal places.)
p-value =
State your conclusion.
Reject H0. There is sufficient evidence to conclude that there is a significant difference among the quality of training provided by the four programs.Do not reject H0. There is not sufficient evidence to conclude that there is a significant difference among the quality of training provided by the four programs. Reject H0. There is not sufficient evidence to conclude that there is a significant difference among the quality of training provided by the four programs.Do not reject H0. There is sufficient evidence to conclude that there is a significant difference among the quality of training provided by the four programs.
H0: There is no difference in the quality of
the training for the programs.
Ha: There is a difference in the quality of the
training for the programs.
applying Kruskal Wallis Test:
test statistic =8.49
p-value =0.037
Reject H0. There is sufficient evidence to conclude that there is a significant difference among the quality of training provided by the four programs
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