Answer
(a) z ≈ 1.97
(b) A towing capacity of 16,500 pounds is about 1.97 standard deviations above the mean.
(c) Not unusual
Work Step by Step
z = (16500 - 11830)/2370 = 1.97
z score between -2 and 2 is usual
Elementary Statistics: Picturing the World (6th Edition)
by Larson, Ron; Farber, Betsy
Published by
Pearson
ISBN 10:
0321911210
ISBN 13:
978-0-32191-121-6
Chapter 2 - Descriptive Statistics - Review Exercises - Page 119: 45
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