For Exercises 7.75 and 7.76, see page 402; for 7.77 and 7.78, see page 404; for 7.79 and 7.80, see page 406; and for 7.81 see page 408.
7.75 Starting salaries
In a recent survey by the National Association of Colleges and Employers, the average starting salary for computer science majors was reported to be $61,741.32 You are planning to do a survey of starting salaries for recent computer science majors from your university. Using an estimated standard deviation of $15,300, what sample size do you need to have a margin of error equal to $5000 with 95% confidence?
7.75
. Answers may vary if using software.