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Test Prep. A GRE prep company claims that average score improvement of their students is equal to 90 points. We want to see if it is different than this. We randomly sample students for their average improvement. The data we collected are below. GRE scores are known to be normally distributed. Points 90.4 84 77 75.2 81.5 78.4 96.5 97.3 101.5 85.3 69.5 88.6 92.4 Evaluate the company's claim using a hypothesis test. You wish to test the following claim (Ha) at a significance level of a = 0.05. (a) Write the hypothesis for the test. O Ho: H= 90 Ha: p = 90 O H;: H = 90 Ha: p< 90 O Ho: H = 90 Ha: p> 90 O Ho: H = 85.969 Ha: p = 85.969 Ο H : μ- 85. 969 H3: p < 85.969 Ο H : μ- 85. 969 H: p> 85.969 (b) What is the p-value for this test (round to 4 decimal place) (c) Based on the sample data, we sould conclude that ...

Test Prep. A GRE prep company claims that average score improvement of their students is equal to 90 points. We want to see if it is different than this. We randomly sample students for their average improvement. The data we collected are below. GRE scores are known to be normally distributed. Points 90.4 84 77 75.2 81.5 78.4 96.5 97.3 101.5 85.3 69.5 88.6 92.4 Evaluate the company's claim using a hypothesis test. You wish to test the following claim (Ha) at a significance level of a = 0.05. (a) Write the hypothesis for the test. O Ho: H= 90 Ha: p = 90 O H;: H = 90 Ha: p< 90 O Ho: H = 90 Ha: p> 90 O Ho: H = 85.969 Ha: p = 85.969 Ο H : μ- 85. 969 H3: p < 85.969 Ο H : μ- 85. 969 H: p> 85.969 (b) What is the p-value for this test (round to 4 decimal place) (c) Based on the sample data, we sould conclude that ...

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Test Prep. A GRE prep company claims that average score improvement of their students is equal to 90 points. We want to see if it is different than this. We randomly sample students for their average improvement. The data we collected are below. GRE scores are known to be normally distributed. Points 90.4 84 77 75.2 81.5 78.4 96.5 97.3 101.5 85.3 69.5 88.6 92.4 Evaluate the company's claim using a hypothesis test. You wish to test the following claim (Ha) at a significance level of a = 0.05. (a) Write the hypothesis for the test. O Ho: H= 90 Ha: p = 90 O H;: H = 90 Ha: p< 90 O Ho: H = 90 Ha: p> 90 O Ho: H = 85.969 Ha: p = 85.969 Ο H : μ- 85. 969 H3: p < 85.969 Ο H : μ- 85. 969 H: p> 85.969 (b) What is the p-value for this test (round to 4 decimal place) (c) Based on the sample data, we sould conclude that ... O There is enough evidence at the a = 0.05 level to say that the average improvement is not 90 points. O There is not enough evidence at the a = 0.05 level to say that the average improvement is not 90. Question Help: O Message instructor D Post to forum Submit Question Jump to Answer
Transcribed Image Text:Test Prep. A GRE prep company claims that average score improvement of their students is equal to 90 points. We want to see if it is different than this. We randomly sample students for their average improvement. The data we collected are below. GRE scores are known to be normally distributed. Points 90.4 84 77 75.2 81.5 78.4 96.5 97.3 101.5 85.3 69.5 88.6 92.4 Evaluate the company's claim using a hypothesis test. You wish to test the following claim (Ha) at a significance level of a = 0.05. (a) Write the hypothesis for the test. O Ho: H= 90 Ha: p = 90 O H;: H = 90 Ha: p< 90 O Ho: H = 90 Ha: p> 90 O Ho: H = 85.969 Ha: p = 85.969 Ο H : μ- 85. 969 H3: p < 85.969 Ο H : μ- 85. 969 H: p> 85.969 (b) What is the p-value for this test (round to 4 decimal place) (c) Based on the sample data, we sould conclude that ... O There is enough evidence at the a = 0.05 level to say that the average improvement is not 90 points. O There is not enough evidence at the a = 0.05 level to say that the average improvement is not 90. Question Help: O Message instructor D Post to forum Submit Question Jump to Answer
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