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In an effort to improve the statistics data analysis skills of 25 students, a teacher provides a weekly 2-hour tutoring session for the students. A pretest is given before the sessions, and a post-test is given after. Test scores are shown in Spreadsheet "Question 6". Pretest mark X₁: 71 61 63 66 68 64 63 78 70 65 49 72 67 44 64 60 62 59 64 64 69 68 66 76 62 Post-test mark X2: 64 60 79 79 70 79 63 71 79 64 89 54 57 89 86 81 69 72 76 75 75 81 77 63 78 Post-Pre D = X2 - X₁: -7 -1 16 13 2 15 0-7 9-1 40 -18 -10 45 22 21 7 13 12 11 6 13 11-13 16 n = 25, Σε - 215, = D² = 7043. Let HD be the mean score of the population differences (post-test pre-test scores). (a) What is the point estimate of μD? (b) Find the 95% confidence interval for HD. (c) The teacher claims that the sessions can help to improve the students' data analysis skills by more than 2 points (μD > 2), Test the claim at a = =0.05. 6

In an effort to improve the statistics data analysis skills of 25 students, a teacher provides a weekly 2-hour tutoring session for the students. A pretest is given before the sessions, and a post-test is given after. Test scores are shown in Spreadsheet "Question 6". Pretest mark X₁: 71 61 63 66 68 64 63 78 70 65 49 72 67 44 64 60 62 59 64 64 69 68 66 76 62 Post-test mark X2: 64 60 79 79 70 79 63 71 79 64 89 54 57 89 86 81 69 72 76 75 75 81 77 63 78 Post-Pre D = X2 - X₁: -7 -1 16 13 2 15 0-7 9-1 40 -18 -10 45 22 21 7 13 12 11 6 13 11-13 16 n = 25, Σε - 215, = D² = 7043. Let HD be the mean score of the population differences (post-test pre-test scores). (a) What is the point estimate of μD? (b) Find the 95% confidence interval for HD. (c) The teacher claims that the sessions can help to improve the students' data analysis skills by more than 2 points (μD > 2), Test the claim at a = =0.05. 6

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
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In an effort to improve the statistics data analysis skills of 25 students, a teacher provides a weekly 2-hour tutoring session for the students. A pretest is given before the sessions, and a post-test is given after. Test scores are shown in Spreadsheet "Question 6". Pretest mark X₁: 71 61 63 66 68 64 63 78 70 65 49 72 67 44 64 60 62 59 64 64 69 68 66 76 62 Post-test mark X2: 64 60 79 79 70 79 63 71 79 64 89 54 57 89 86 81 69 72 76 75 75 81 77 63 78 Post-Pre D = X2 - X₁: -7 -1 16 13 2 15 0-7 9-1 40 -18 -10 45 22 21 7 13 12 11 6 13 11-13 16 n = 25, Σε - 215, = D² = 7043. Let HD be the mean score of the population differences (post-test pre-test scores). (a) What is the point estimate of μD? (b) Find the 95% confidence interval for HD. (c) The teacher claims that the sessions can help to improve the students' data analysis skills by more than 2 points (μD > 2), Test the claim at a = =0.05. 6
Transcribed Image Text:In an effort to improve the statistics data analysis skills of 25 students, a teacher provides a weekly 2-hour tutoring session for the students. A pretest is given before the sessions, and a post-test is given after. Test scores are shown in Spreadsheet "Question 6". Pretest mark X₁: 71 61 63 66 68 64 63 78 70 65 49 72 67 44 64 60 62 59 64 64 69 68 66 76 62 Post-test mark X2: 64 60 79 79 70 79 63 71 79 64 89 54 57 89 86 81 69 72 76 75 75 81 77 63 78 Post-Pre D = X2 - X₁: -7 -1 16 13 2 15 0-7 9-1 40 -18 -10 45 22 21 7 13 12 11 6 13 11-13 16 n = 25, Σε - 215, = D² = 7043. Let HD be the mean score of the population differences (post-test pre-test scores). (a) What is the point estimate of μD? (b) Find the 95% confidence interval for HD. (c) The teacher claims that the sessions can help to improve the students' data analysis skills by more than 2 points (μD > 2), Test the claim at a = =0.05. 6
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