Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $30,000 and $40,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. a. What is the planning value for the population standard deviation? 0 = b. How large a sample should be taken if the desired margin of error is $500? Round your answers to next whole number. $250? $70? c. Would you recommend trying to obtain the $70 margin of error? Explain. Select your answer

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