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 1 year 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...
Suppose that test scores on the Graduate Management Admission Test (GMAT) are normally distributed with a...
Suppose that test scores on the Graduate Management Admission
Test (GMAT) are normally distributed with a mean of 530 and
standard deviation of 75.
a. What GMAT score separates the highest 15% of the scores from
the rest? Do not round intermediate calculations. Round your answer
to the nearest whole number. GMAT score =
b. What GMAT score corresponds to the 97 percentile? Do not
round intermediate calculations. Round your answer to the nearest
whole number. GMAT score =
c....
Suppose that Raven studied for the Graduate Management Admission Test (GMAT) using a well-known preparation class...
Suppose that Raven studied for the Graduate Management Admission
Test (GMAT) using a well-known preparation class and was thrilled
to receive a total score of 770. Her friend Eric, however, thinks
she would have scored just as well without the class.
To test the efficacy of the class, they obtain a small but
random sample of 19 test results from other students using the same
class. This sample's average is 568.56 with a standard deviation of
116.72. In comparison, the...
An instructor for a test preparation course claims that the course will improve the test scores...
An instructor for a test preparation course claims that the
course will improve the test scores of students. The table shows
the critical reading scores for 14 students the first two times
they took the test. Before taking the test for the second time,
the students took the instructor's course to try to improve their
critical reading test scores. At a = 0.01, is there enough
evidence to support the instructor's claim? Complete parts (a)
through (f). number of students:14....
The Graduate Management Admission Test (GMAT) has scores from 100 to 900. Scores are supposed to...
The Graduate Management Admission Test (GMAT) has scores from
100 to 900.
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
information and the 68-95-99.7 Rule, where do you stand among all
students who took the GMAT?
b.Suppose you earned a 450 on your GMAT test. Where do you stand
among all students who took the GMAT?
c. Assuming...
Two teaching methods and their effects on science test scores are being reviewed. A random sample...
Two teaching methods and their effects on science test scores
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
the claim that the mean science test score is lower for students
taught...
Two teaching methods and their effects on science test scores are being reviewed. A random sample...
Two teaching methods and their effects on science test scores
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
the claim that the mean science test score is lower for students
taught...
Two teaching methods and their effects on science test scores are being reviewed. A random sample...
Two teaching methods and their effects on science test scores
are being reviewed. A random sample of 1515 students, taught in
traditional lab sessions, had a mean test score of 71.871.8 with a
standard deviation of 6.16.1. A random sample of 1010 students,
taught using interactive simulation software, had a mean test score
of 84.384.3 with a standard deviation of 5.25.2. Do these results
support the claim that the mean science test score is lower for
students taught in traditional...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- The _______ is usually the hypothesis that the researcher wants to gather evidence against. null...
- Have you ever sent a text message that revealed your most intimate of thoughts and emotions? Text...
- Can Bankruptcy be considered as a legitimate and ethical management vehicle to be used for the benefit...
- Step 1: Create a new Java project called Lab5.5. Step 2: Now create a new class...
- Consider each situation in turn and for each say whether hashing, encryption or both would be...
- The value of the equilibrium constant for the electrochemical reaction MnO4–(aq) + 2H+(aq) + ½Cl2(g) ⇌Mn2+(aq)+...
- Summarize the nutrient needs of an infant up to the first year of life. When are...
ADVERTISEMENT