Professors at a Local University Earn an Average Salary of $80,000

Multiple Choice

Professors at a local university earn an average salary of $80,000 with a standard deviation of $6,000.The salary distribution is approximately bell-shaped.What can be said about the percentage of salaries that are less than $68,000 or more than $92,000?

A) About 5 percent
B) About 32 percent.
C) About 68 percent.
D) About 95 percent.