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Lesson: 9.3 Comparing Two Population Me...
Question 8 of 10 , Step 1 of 2
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To determine if his teaching method increases students' learning, a professor administers a pretest to his class at the beginning of the semester and then a posttest at the end of the semester. The results from 10 randomly chosen students are given below. Let Population 1 be the Pretest scores and Population 2 be the Posttest scores.
able[[Test Scores],[Pretest,Posttest],[73,55],[81,53],[99,92],[91,84],[89,73],[88,88],[91,81],[95,97],[78,73]]
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Step 1 of 2 : Construct a 90% confidence interval for the true mean difference between the scores to determine if the teaching method increases students' knowledge of the course material. Round the endpoints of the interval to one decimal place, if necessary.
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Save&Exit Practice Lesson:9.3 Comparing Two Population Me. Question 8of 10,Step1of 2
EMILIE SOTHMAN
2/20 Correct
14 Incorrect To determine if his teaching method increases studentslearning,a professor administers a pretest to his class at the beginning of the semester and then a posttest at the
Test Scores
Pretest 73 81 99 91 89 88 91 95 84 78
Posttest 55 53 92 84 73 88 81 97 73 80
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Step 1 of 2: Construct a 90 % confidence interval for the true mean difference between the scores to determine if he teaching method increases students knowledge of the course material. Round the endpoints of the interval to one decimal place, if necessary.
Answer
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Lower Endpoint =
Upper Endpoint =