Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $20,000 and $40,000.

Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired.

How large a sample should be taken if the desired margin of error is:

a. $300?

b. $270?

c. $140?

d. Would you recommend trying to obtain the $140 margin of error? Explain.

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