Answer
For tyre 1 z score = 0.25
Percentile = 16th
For tyre 2 z score = -0.75
Percentile = 97.5th
For tyre 3 z score = 2.25
Percentile = 2.5th
z-score of tyre 3 is unusual
Work Step by Step
z = (x - μ) / σ
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 - Section 2.5 Measures of Position - Exercises - Page 112: 48
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