Let μ₁ be the mean test scores for those who took the preparation course and let µ₂ be the mean test scores for those who did not take the course. Determine the null and alternative hypotheses. Choose the correct answer below. OA. Ho: H₁-H₂ = 0 H₁: H₁-H₂0 D. Ho: H₁-H₂ <0 H₁: H₁-H₂ 20 OB. Ho: H₁-H₂ ²0 H₁: H₁-H₂ <0 E. Ho: ₁-₂0 H₁: H₁-H₂ ≤0 C. Ho: μ₁ −μ₂ #0 H₁: H₁-H₂ = 0 OF. Ho: H₁-H₂ ≤0 H₁: H₁-H₂>0

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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Sample;Took_course;Did_not_take_course
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4;84;76
5;69;53
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9;90;85
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12;93;89
13;75;62
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20;89;83

An agency offers preparation courses for a graduate school admissions test to students. As part of an experiment to evaluate the
merits of the course, 40 students were chosen and divided into 20 pairs in such a way that the members of any pair had similar
academic records. Before taking the test, one member of each pair was assigned at random to take the preparation course, while
the other member did not take a course. The achievement test scores are contained in the accompanying table. Assuming that the
differences in scores follow a normal distribution, test at the 5% level, the null hypothesis that the two population means are equal
against the alternative that the true mean is higher for students taking the preparation course.
Click the icon to view the data table.
Click the icon to view the critical values of the Student's t distribution.
Let μ₁ be the mean test scores for those who took the preparation course and let μ₂ be the mean test scores for those who did
not take the course. Determine the null and alternative hypotheses. Choose the correct answer below.
A. Ho: H₁-H₂ = 0
H₁: H₁-H₂ #0
D. Ho: ₁-₂ <0
H₁: μ₁ −μ₂ 20
B. Ho: ₁-₂ 20
H₁: H₁-H₂ <0
O E. Ho: H₁-H₂>0
H₁: μ₁ −μ₂ ≤0
C. Ho: H₁ H₂ #0
H₁: H₁-H₂ = 0
F. Ho: ₁-₂ ≤0
H₁: M₁-H₂>0
Transcribed Image Text:An agency offers preparation courses for a graduate school admissions test to students. As part of an experiment to evaluate the merits of the course, 40 students were chosen and divided into 20 pairs in such a way that the members of any pair had similar academic records. Before taking the test, one member of each pair was assigned at random to take the preparation course, while the other member did not take a course. The achievement test scores are contained in the accompanying table. Assuming that the differences in scores follow a normal distribution, test at the 5% level, the null hypothesis that the two population means are equal against the alternative that the true mean is higher for students taking the preparation course. Click the icon to view the data table. Click the icon to view the critical values of the Student's t distribution. Let μ₁ be the mean test scores for those who took the preparation course and let μ₂ be the mean test scores for those who did not take the course. Determine the null and alternative hypotheses. Choose the correct answer below. A. Ho: H₁-H₂ = 0 H₁: H₁-H₂ #0 D. Ho: ₁-₂ <0 H₁: μ₁ −μ₂ 20 B. Ho: ₁-₂ 20 H₁: H₁-H₂ <0 O E. Ho: H₁-H₂>0 H₁: μ₁ −μ₂ ≤0 C. Ho: H₁ H₂ #0 H₁: H₁-H₂ = 0 F. Ho: ₁-₂ ≤0 H₁: M₁-H₂>0
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