The figure below illustrates a standard deviation is $500. Use the empirical rule (the 68-95-99.7 rule) to find the percentage of buyers who paid between $15,000 and $16,500. The mean is $15,000 and the percentage of buyers who paid between $15,000 and $16,500.
99.7% - 68% - 95% Number of Car Buyers Price of a Model of a New Car