Exam 6

6. Assume that the salaries of elementary school teachers in the US are normally distributed with a mean of $48,000 and a standard deviation of $3,000. a) What percentage of elementary school teachers have a salary of more than $50,000? b ) If 1000 teachers are selected, how many would you expect, approximately, to have a salary of less than $45,000? C) What is the 99th percentile of salaries