Your assignment is to estimate the average number of hours a day that people spend doing e-mail.
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Your assignment is to estimate the average number of hours a day that people spend doing e-mail. You think the standard deviation is probably around 2 hours. If so, how large a sample do you need for a 95 percent confidence interval to be approximately ±10 minutes?
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To determine the required sample size for estimating the average number of hours peopl...View the full answer
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Related Book For 
Essential Statistics Regression And Econometrics
ISBN: 9780123822215
1st Edition
Authors: Gary Smith
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