Answer
See below.
Work Step by Step
A line of people cannot have $3.2$ people, because the number of people can only be an integer value. Thus this average length can not happen in reality.
Stats: Data and Models (3rd Edition)
by De Vaux, Richard D.; Velleman, Paul D.; Bock, David E.
Published by
Pearson
ISBN 10:
0321692551
ISBN 13:
978-0-32169-255-9
Chapter 11 - Understanding Randomness - Exercises - Page 278: 13
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