The annual incomes of all MBA degree holders working in Los Angeles have a bell-shaped distribution with a mean of $71,000 and a standard deviation of $8,000.According to the empirical rule,the percentage of MBA degree holders working in Los Angeles who have an annual income of $63,000 to $79,000 is approximately:
A)86%
B)68%
C)64%
D)89%

Question

Quizplus · Accepted Answer

According to the empirical rule, approximately 68% of data falls within one standard deviation of the mean in a bell-shaped distribution. $63,000 to $79,000 is within one standard deviation ($71,000 ± $8,000).

The Annual Incomes of All MBA Degree Holders Working in Los