You may need to use the appropriate appendix table or technology to answer this question. A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation is o = 8. (Round your answers to two decimal places.) (a) What is the standard error of the mean, o-? 8 (b) At 95% confidence, what is the margin of error? Need Help? Read It

Microeconomic Theory
12th Edition
ISBN:9781337517942
Author:NICHOLSON
Publisher:NICHOLSON
Chapter2: Mathematics For Microeconomics
Section: Chapter Questions
Problem 2.16P
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ASWESBE9 8.E.001.
You may need to use the appropriate appendix table or technology to answer this question.
A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation is o = 8. (Round your answers to two decimal places.)
(a) What is the standard error of the mean, o-?
(b) At 95% confidence, what is the margin of error?
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Transcribed Image Text:4. [-/2 Points] DETAILS ASWESBE9 8.E.001. You may need to use the appropriate appendix table or technology to answer this question. A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation is o = 8. (Round your answers to two decimal places.) (a) What is the standard error of the mean, o-? (b) At 95% confidence, what is the margin of error? Need Help? Read It Viewing Saved Work Revert to Last Response
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