The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 7 - Exploring Data: Part I Review - Supplementary Exercises - Page 195: 7.40b

Answer

Since the histogram is roughly symmetric, we expect the mean to be close to the median. To calculate the mean, we sum all of the values and divide by the number of observations: Mean =$ \frac{290+420+....+580}{48} = 563.125$ Since the data set has even number of values, we divide the middle two values to get the median: Median =$ \frac{560+560}{2} = 560$

Work Step by Step

Since the histogram is roughly symmetric, we expect the mean to be close to the median. To calculate the mean, we sum all of the values and divide by the number of observations: Mean =$ \frac{290+420+....+580}{48} = 563.125$ Since the data set has even number of values, we divide the middle two values to get the median: Median =$ \frac{560+560}{2} = 560$
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