Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $10,000 and $40,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. Given the information in the Microsoft Excel Online file below, construct a spreadsheet to determine how large a sample should be taken for each desired margin of error.
For a margin of error of ± $400 , the required sample size is n =
For a margin of error of ± $270 , the required sample size is n =
For a margin of error of ± $100 , the required sample size is n =
Would you recommend trying to obtain the $100 margin of error? Explain.
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