A consumer group wants to estimate the mean electric bill for the month of July for singlefamily
Question:
a. What sample size is needed?
b. If 95% confidence is desired, how many homes need to be selected?
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Related Book For 
Statistics For Managers Using Microsoft Excel
ISBN: 772
7th Edition
Authors: David M. Levine, David F. Stephan, Kathryn A. Szabat
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