A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is σ = 15.

Now, assume that the same sample mean was obtained from a sample of 120 items (doubled from from the previous question) . Get a 95% confidence interval for the population mean and

What is the effect of a larger sample size on the interval estimate?

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