Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $80,000 and $45,000. Assume that a 95% confidence interval estimate of the...

Extracted text: Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $80,000 and $45,000. 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? b. How large a sample should be taken if the desired margin of error is $3007 Round your answers to next whole number. $270? $1402 Would you recommend trying to obtain the $140 margin of error? Explain. C. -Sclect your answer-