Question
In: Statistics and Probability
Three admission test preparation programs are being evaluated. Suppose the scores obtained by a sample of...
Three admission test preparation programs are being evaluated. Suppose the scores obtained by a sample of 20 people who used the programs provided the following data.
| Program | ||
|---|---|---|
| A | B | C |
| 520 | 450 | 600 |
| 400 | 520 | 630 |
| 480 | 400 | 570 |
| 530 | 440 | 480 |
| 480 | 470 | 580 |
| 640 | 390 | 610 |
| 550 | 590 | |
Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use α = 0.05.
Find the value of the test statistic. (Round your answer to two decimal places.)
test statistic=____?____
Find the p-value. (Round your answer to three decimal places.)
p-value = ___?___
Solutions
Expert Solution
applying test from Minitab:
Kruskal-Wallis Test: response versus factor
Kruskal-Wallis Test on response
factor N Median Ave Rank Z
A 6 500.0 10.2 -0.16
B 7 450.0 6.0 -2.50
C 7 590.0 15.3 2.65
Overall 20 10.5
H = 8.65 DF = 2 P = 0.013
H = 8.69 DF = 2 P = 0.013 (adjusted for ties)
test statistic H =8.65 (please try 8.69 if this comes wrong)
p-value = 0.013
orchestra answered 2 years agoRelated Solutions
Three admission test preparation programs are being evaluated. Suppose the scores obtained by a sample of...
Three admission test preparation programs are being evaluated.
Suppose the scores obtained by a sample of 20 people who used the
programs provided the following data.
Program
A
B
C
520
450
600
400
520
610
490
400
560
510
440
490
490
460
590
640
370
630
550
570
Use the Kruskal-Wallis test to determine whether there is a
significant difference among the three test preparation programs.
Use α = 0.05.
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Three admission test preparation programs are being evaluated. Suppose the scores obtained by a sample of...
Three admission test preparation programs are being evaluated.
Suppose the scores obtained by a sample of 20 people who used the
programs provided the following data.
Program
A
B
C
510
450
600
400
510
630
460
400
590
530
420
460
460
490
560
620
380
640
550
580
Use the Kruskal-Wallis test to determine whether there is a
significant difference among the three test preparation programs.
Use α = 0.05.
Find the value of the test statistic. (Round...
Three admission test preparation programs are being evaluated. Suppose the scores obtained by a sample of...
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Suppose the scores obtained by a sample of 20 people who used the
programs provided the following data.
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A
B
C
510
450
600
400
510
640
490
400
580
540
420
490
490
480
590
620
360
630
550
560
Use the Kruskal-Wallis test to determine whether there is a
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