Annual starting salaries for college graduates with degrees in business administration are generally expected to be betweenand. Assume that aconfidence interval estimate of the population mean annual starting salary is desired.

a.What is the planning value for the population standard deviation?

b.How large a sample should be taken if the desired margin of error is? Round your answers to next whole number.

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c.Would you recommend trying to obtain themargin of error? Explain.