Annual starting salaries of college graduates with degrees in business administration are generally expected to be between $ 10 , 000 and 35 , 000. 1) Assume that a 95 % confidence interval estimate of the population mean annual starting salary is desired. Determine the planning value for the population standard deviation. 2) Determine how large a sample should be taken if the desired margin of error is: a . $ 500 b . $ 190 c . $ 90 d . Would you recommend trying to obtain the $ 90 margin of error? Explain