A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation is σ = 5. At 95% confidence, what is the margin of error to provide a 95% confidence interval to estimate the population mean?

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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A simple random sample of 40 items resulted in a sample mean of 25. The population standard deviation is σ = 5.

At 95% confidence, what is the margin of error to provide a 95% confidence interval to estimate the population mean?

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