Answer
$ -20, 0, 1, 2, 3$
$Q_{1} = 0$
$ mean = ((-20) + 0 + 1 + 2 + 3)/5$
$ mean = -14/5$
$ mean = -2.8$
Work Step by Step
An outlier for the data set would shift the mean to be less than $Q_{1}$.
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 2 - Describing Distributions with Numbers - Chapter 2 Exercises - Page 70: 2.42
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