A random sample of 100 credit sales in a department store showed an average sale of $120.00. From pa
Question: A random sample of 100 credit sales in a department store showed an average sale of $120.00. From past data, it is known that the standard deviation of the population is $40.00.
a) What is the 95% confidence interval of the population mean?
b) What size sample should be selected to obtain a 0.95 probability of estimating the average sale within $5 or less?
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Deliverables: Word Document
Deliverables: Word Document
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