The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 1-46414-253-X
ISBN 13: 978-1-46414-253-6

Chapter 3 - The Normal Distributions - Apply Your Knowledge: 3.3


The mean and median of the density curve in Figure 3.4 are both 2.5 miles.

Work Step by Step

At 2.5 miles, the area under the curve is balanced and equally divided in half. The curve is a symmetric density curve, so we know that the mean and the median will be the same value.
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