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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
7-17. The file entitled Clothing contains the monthly retail sales ($millions) of U.S. women’s clothing stores for
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70 months. A sample taken from this population to estimate the average sales in this time period follows:
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2,942Â Â Â 2,574Â Â Â 2,760Â Â Â 2,939Â Â Â 2,642Â Â Â 2,905Â Â Â 2,568
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2,677Â Â Â 2,572Â Â Â 3,119Â Â Â 2,697Â Â Â 2,884Â Â Â 2,632Â Â Â 2,742
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2,671Â Â Â 2,884Â Â Â 2,946Â Â Â 2,825Â Â Â 2,987Â Â Â 2,729Â Â Â 2,676
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2,846Â Â Â 3,112Â Â Â 2,924Â Â Â 2,676
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a. Calculate the population mean. b. Calculate the sample mean.
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c. How much sampling error is present in this sample?
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d. Determine the range of possible sampling error if
25 sales figures are sampled at random from this population
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