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 2 - Describing Distributions with Numbers - Apply Your Knowledge: 2.3

Answer

Sum of travel times: 625 minutes # workers: 20 Mean travel time: 31.25 minutes This is higher than the median time of 22.5 minutes, showing that the median can be less than the mean.

Work Step by Step

$ 10+30+5+25+40+20+10+15+30+20+15+20+85+15+65+15+60+60+40+45 = 625 $ $ 625/20 = 31.25 $
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