Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $10,000 and $50,000. assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. how large a sample should be taken if the desired margin of error is: a. $400? remove all commas from your answer before submitting. b. $190? remove all commas from your answer before submitting. c. $70? remove all commas from your answer before submitting. d. would you recommend trying to obtain the $70 margin of error? explain.