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.

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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 BC
520 450 600
400 520 630
490
400
580
530
440
490
490
480
590
640
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, = Median, - Medianc
H: Median, + Mediang + Median,
O Ho: Median, + Mediang + Median c
H: Median, = Median, = Median,
O Ho: All populations of test scores are identical.
H: Not all populations of test scores are identical.
O Ho: Not all populations of test scores are identical.
H: All populations of test scores are identical.
O Ho: Median, = Median, = Median.
H: Median, > Mediang < Median.
Find the value of the test statistic. (Round your answer to two decimal places.)
9.06
Find the p-value. (Round your answer to three decimal places.)
p-value =011
State vour conclusion.
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 BC 520 450 600 400 520 630 490 400 580 530 440 490 490 480 590 640 360 610 550 560 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, = Median, - Medianc H: Median, + Mediang + Median, O Ho: Median, + Mediang + Median c H: Median, = Median, = Median, O Ho: All populations of test scores are identical. H: Not all populations of test scores are identical. O Ho: Not all populations of test scores are identical. H: All populations of test scores are identical. O Ho: Median, = Median, = Median. H: Median, > Mediang < Median. Find the value of the test statistic. (Round your answer to two decimal places.) 9.06 Find the p-value. (Round your answer to three decimal places.) p-value =011 State vour conclusion.
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