The Annual Incomes of All MBA Degree Holders Working in Los

Multiple Choice

The annual incomes of all MBA degree holders working in Los Angeles have a bell-shaped distribution with a mean of $72,000 and a standard deviation of $6,000.According to the empirical rule,the percentage of MBA degree holders working in Los Angeles who have an annual income of $54,000 to $90,000 is approximately:

A) 97.9%
B) 99.4%
C) 94.9%
D) 99.7%