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a) Test at the 1% significance level if there is a change in the academic performance of students due to hypnotism. b) Construct a 99% confidence interval to see whether there is difference in the academic performance using hypnosis. c) According to the interval, clearly state if the data supports the claim that the hypnosis changed the academic performance.

a) Test at the 1% significance level if there is a change in the academic performance of students due to hypnotism. b) Construct a 99% confidence interval to see whether there is difference in the academic performance using hypnosis. c) According to the interval, clearly state if the data supports the claim that the hypnosis changed the academic performance.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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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1) A random sample of cight students was selected to test for the effectiveness of hypnosis on their academic performance. The following table gives the GPA for the semester before and the semester after they tried hypnosis. Before 2.3 | 2.6 2.8 3.1 2.7 3.4 2.6 2.8 2.5 After 3.2 3.0 3.5 3.7 2.4 2.9 2.9 a) Test at the 1% significance level if there is a change in the academic performance of students due to hypnotism. b) Construct a 99% confidence interval to see whether there is difference in the academic performance using hypnosis. c) According to the interval, clearly state if the data supports the claim that the hypnosis changed the academic performance. d) Is the result in a) and b) consistent? Explain briefly.
Transcribed Image Text:1) A random sample of cight students was selected to test for the effectiveness of hypnosis on their academic performance. The following table gives the GPA for the semester before and the semester after they tried hypnosis. Before 2.3 | 2.6 2.8 3.1 2.7 3.4 2.6 2.8 2.5 After 3.2 3.0 3.5 3.7 2.4 2.9 2.9 a) Test at the 1% significance level if there is a change in the academic performance of students due to hypnotism. b) Construct a 99% confidence interval to see whether there is difference in the academic performance using hypnosis. c) According to the interval, clearly state if the data supports the claim that the hypnosis changed the academic performance. d) Is the result in a) and b) consistent? Explain briefly.
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