Sample size for estimating the population mean

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The annual starting salaries for college graduates with business administration degrees are believed to have a standard deviation of approximately $2000. Assume that 95% confidence interval estimate of the annual starting salary is desired. How large a sample should be taken if the desired margin of error E is:

a. E = $500? n = ________________________

b. E = $200? n = ________________________

c. E = $100? n = ________________________

Reference no: EM1315741

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