A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation is σ = 5. a. What is the standard error of the mean, σ x ? b. At 95% confidence, what is the margin of error?
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Essentials Of Statistics For Busin...
9th Edition
David R. Anderson + 4 others
Publisher: South-Western College Pub
ISBN: 9780357045435
BuyFindarrow_forward
Essentials Of Statistics For Busin...
9th Edition
David R. Anderson + 4 others
Publisher: South-Western College Pub
ISBN: 9780357045435
Chapter 8.1, Problem 1E
Textbook Problem
A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation is σ = 5.
- a. What is the standard error of the mean, σx?
- b. At 95% confidence, what is the margin of error?
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Essentials Of Statistics For Business & Economics
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