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 cannot be regarded as bell-shaped. What can be said about the percentage of salaries that are less than $68,000 or more than or more than $92,000?

A) It is at least 75%.
B) It is at most 75%.
C) It is at least 25%.
D) It is at most 25%.