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 530 450 600 400 530 640 490 400 570 540 420 490 490 470 590 620 360 610 550 560 Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use a = 0.05. State the null and alternative hypotheses. O Ho: Median, Median, + Median. H: Median, = Mediang = Median. O H: Not all populations of test scores are identical. H: All populations of test scores are identical. O Ho: Median, = Mediang = Medianc H: Median, + Mediang • Median, O H: All populations of test scores are identical. H: Not all populations of test scores are identical. O Ho: Median, = Mediang = Median. H: Median, > Mediang < Median. 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. O Do not reject H. There is not sufficient evidence to conclude that there is a significant difference among the three test preparation programs. O Reject H. There is sufficient evidence to conclude that there is a significant difference among the three test preparation programs. O Reject H. There is not sufficient evidence to conclude that there is a significant difference among the three test preparation programs. O Do not reject Hg. There is sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
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 530 450 600 400 530 640 490 400 570 540 420 490 490 470 590 620 360 610 550 560 Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use a = 0.05. State the null and alternative hypotheses. O Ho: Median, Median, + Median. H: Median, = Mediang = Median. O H: Not all populations of test scores are identical. H: All populations of test scores are identical. O Ho: Median, = Mediang = Medianc H: Median, + Mediang • Median, O H: All populations of test scores are identical. H: Not all populations of test scores are identical. O Ho: Median, = Mediang = Median. H: Median, > Mediang < Median. 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. O Do not reject H. There is not sufficient evidence to conclude that there is a significant difference among the three test preparation programs. O Reject H. There is sufficient evidence to conclude that there is a significant difference among the three test preparation programs. O Reject H. There is not sufficient evidence to conclude that there is a significant difference among the three test preparation programs. O Do not reject Hg. There is sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Transcribed Image Text: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
530
450
600
400
530
640
490
400
570
540
420
490
490
470
590
620
360
610
550
560
Use the Kruskal-Wallis test to determine whether there is a significant difference among the three test preparation programs. Use a = 0.05.
State the null and alternative hypotheses.
O H,: Median, + Mediang + Median
H: Median, = Mediang = Medianc
O Ho: Not all populations of test scores are identical.
H.: All populations of test scores are identical.
O Ho: Median, = Median, = Medianc
H: Median, + Mediang + Median.
O H: All populations of test scores are identical.
H: Not all populations of test scores are identical,
O Ho: Median, = Mediang = Medianc
H: Median, > Mediang « Medianc
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.)
т
p-value =
State your conclusion.
O Do not reject Hn. There is not sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
O Reject H. There is sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
O Reject Hn. There is not sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
O Do not reject Hn. There is sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
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