Answer
(29.5 cm to 42.1 cm)
Work Step by Step
99.7% of all lengths would mean finding the range of three deviations from the mean (35.8).
$35.8-2.1*3 = 35.8-6.3 = 29.5 cm$
$35.8+2.1*3 = 35.8+6.3 = 42.1 cm$
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 3 - The Normal Distributions - Apply Your Knowledge - Page 84: 3.6a
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