g technique. TH nce in the pop

MATLAB: An Introduction with Applications
6th Edition
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Author:Amos Gilat
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The data in Table 15.9 were collected using a completely randomized design. They
are the achievement test scores for four different groups of students, each group taught
by a different teaching technique. The objective of the experiment is to test the hy-
pothesis of no difference in the population distributions of achievement test scores
versus the alternative that they differ in location; that is, at least one of the distribu-
tions is shifted above the others. Conduct the test using the Kruskal-Wallis H-test
with a = .05.
Test Scores (and Ranks) from Four Teaching Techniques
1
2
3
4
65 (3)
59 (1)
94 (23)
87 (19)
78 (11)
89 (21)
73 (8)
67 (4)
80 (14)
79 (12.5)
62 (2)
88 (20)
81 (15.5)
83 (17.5)
69 (5.5)
76 (10)
Rank Sum
T₁ = = 63.5
75 (9)
69 (5.5)
83 (17.5)
81 (15.5)
72 (7)
79 (12.5)
90 (22)
T₂ = 89
T3 =
= 45.5
T₁ = 78
Transcribed Image Text:The data in Table 15.9 were collected using a completely randomized design. They are the achievement test scores for four different groups of students, each group taught by a different teaching technique. The objective of the experiment is to test the hy- pothesis of no difference in the population distributions of achievement test scores versus the alternative that they differ in location; that is, at least one of the distribu- tions is shifted above the others. Conduct the test using the Kruskal-Wallis H-test with a = .05. Test Scores (and Ranks) from Four Teaching Techniques 1 2 3 4 65 (3) 59 (1) 94 (23) 87 (19) 78 (11) 89 (21) 73 (8) 67 (4) 80 (14) 79 (12.5) 62 (2) 88 (20) 81 (15.5) 83 (17.5) 69 (5.5) 76 (10) Rank Sum T₁ = = 63.5 75 (9) 69 (5.5) 83 (17.5) 81 (15.5) 72 (7) 79 (12.5) 90 (22) T₂ = 89 T3 = = 45.5 T₁ = 78
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