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 | 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.
H0: All populations of test scores are
identical.
Ha: Not all populations of test scores are
identical.
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.
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.
Do not 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 sufficient evidence to conclude that there is a significant difference among the three test preparation programs.
Solutions
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
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...
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...
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
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
significant difference among the three test preparation programs.
Use α = 0.05.
Find the value of the test statistic. (Round...
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Scores are supposed to follow a Normal distribution with a mean
of 500 and standard deviation of 150.
a. Suppose you earned a 800 on your GMAT test. From that
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are being reviewed. A random sample of 11 students, taught in
traditional lab sessions, had a mean test score of 78.1 with a
standard deviation of 3 . A random sample of 19 students, taught
using interactive simulation software, had a mean test score of
84.1 with a standard deviation of 5.9 . Do these results support
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are being reviewed. A random sample of 1515 students, taught in
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