USNews and World Report Each Year Conducts a Survey of Starting

Short Answer

U.S.News and World Report each year conducts a survey of starting salaries in various career fields.If you were to devise a plan to replicate this study,how large a sample would you need to take to be 98% certain that your estimate is within $500 of the true mean starting salary? Assume that $\text { σ }$
is $3500.