Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use ? = 0.05. State the null and alternative hypotheses.
Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use ? = 0.05. State the null and alternative hypotheses.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
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 | 620 |
| 490 | 400 | 580 |
| 520 | 430 | 490 |
| 490 | 480 | 590 |
| 630 | 360 | 640 |
| 550 | 560 |
Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use ? = 0.05.
State the null and alternative hypotheses.
-H0: MedianA ≠ MedianB ≠ MedianC
Ha: MedianA = MedianB = MedianC
Ha: MedianA = MedianB = MedianC
-H0: MedianA = MedianB = MedianC
Ha: MedianA ≠ MedianB ≠ MedianC
Ha: MedianA ≠ MedianB ≠ MedianC
-H0: All populations of test scores are identical.
Ha: Not all populations of test scores are identical.
Ha: Not all populations of test scores are identical.
-H0: MedianA = MedianB = MedianC
Ha: MedianA > MedianB < MedianC
Ha: MedianA > MedianB < MedianC
-H0: Not all populations of test scores are identical.
Ha: All populations of test scores are identical.
Ha: All populations of test scores are identical.
Find the value of the test statistic. (Round your answer to two decimal places.)
Answer=??
Find the p-value. (Round your answer to three decimal places.)
p-value =??
State your conclusion.
-Do not reject H0. There is sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
-Reject H0. There is not sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
-Do not reject H0. There is not sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
-Reject H0. There is sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
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