Not everyone pays the same price for
the same model of a car. The figure
illustrates a normal distribution for the
prices paid for a particular model of a
new car. The mean is $21,000 and the
standard deviation is $1000.
Use the 68-95-99.7 Rule to find what
percentage of buyers paid between
$20,000 and $21,000.
Number of Car Buyers
-99.7%-
-95%-
68%-
18
19 20. 21 22 23 24
Price of a Model of a New Car (Thousands)
The percentage of buyers who paid between $20,000 and $21,000 is%.
(Type an exact answer.)