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 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 is500 ? Round your answers to next whole number. 190? -- 140? -- c. Would you recommend trying to obtain the margin of error? Explain.

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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 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 is500 ? Round your answers to next whole number.

190? --

140? --

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

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