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A statistics teacher wants to see if there is any difference in the performance of students on the final exam if she gives them orange jelly beans before the exam. She has a theory that orange jelly beans will change the results, but she isn't sure in which direction. She knows that the population mean score on the exam when students do not have orange jelly beans is 85 and that exam scores have an approximately symmetric distribution. She gives orange jelly beans to 25 randomly selected students and finds that these students had a sample mean score of 88 with a sample standard deviation of 5. She wants to have 99% confidence in her result. • State your answer as shown in the examples in Module 12.90. Include two decimal points in your numbers. • Give the statistical criterion you use to determine whether to reject or fail to reject the hypothesis. • The result of your test of Ho in statistical terms.

A statistics teacher wants to see if there is any difference in the performance of students on the final exam if she gives them orange jelly beans before the exam. She has a theory that orange jelly beans will change the results, but she isn't sure in which direction. She knows that the population mean score on the exam when students do not have orange jelly beans is 85 and that exam scores have an approximately symmetric distribution. She gives orange jelly beans to 25 randomly selected students and finds that these students had a sample mean score of 88 with a sample standard deviation of 5. She wants to have 99% confidence in her result. • State your answer as shown in the examples in Module 12.90. Include two decimal points in your numbers. • Give the statistical criterion you use to determine whether to reject or fail to reject the hypothesis. • The result of your test of Ho in statistical terms.

ENGR.ECONOMIC ANALYSIS
ENGR.ECONOMIC ANALYSIS
14th Edition
ISBN:9780190931919
Author:NEWNAN
Publisher:NEWNAN
Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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A statistics teacher wants to see if there is any difference in the performance of students on the final exam if she gives them orange jelly beans before the exam. She has a theory that orange jelly beans will change the results, but she isn't sure in which direction. She knows that the population mean score on the exam when students do not have orange jelly beans is 85 and that exam scores have an approximately symmetric distribution. She gives orange jelly beans to 25 randomly selected students and finds that these students had a sample mean score of 88 with a sample standard deviation of 5. She wants to have 99% confidence in her result.
Transcribed Image Text:A statistics teacher wants to see if there is any difference in the performance of students on the final exam if she gives them orange jelly beans before the exam. She has a theory that orange jelly beans will change the results, but she isn't sure in which direction. She knows that the population mean score on the exam when students do not have orange jelly beans is 85 and that exam scores have an approximately symmetric distribution. She gives orange jelly beans to 25 randomly selected students and finds that these students had a sample mean score of 88 with a sample standard deviation of 5. She wants to have 99% confidence in her result.
• State your answer as shown in the examples in Module 12.90. Include two decimal points in your numbers. • Give the statistical criterion you use to determine whether to reject or fail to reject the hypothesis. • The result of your test of Ho in statistical terms.
Transcribed Image Text:• State your answer as shown in the examples in Module 12.90. Include two decimal points in your numbers. • Give the statistical criterion you use to determine whether to reject or fail to reject the hypothesis. • The result of your test of Ho in statistical terms.
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