Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 3 - Statistics for Describing, Exploring, and Comparing Data - 3-4 Measures of Relative Standing and Boxplots - Page 125: 28

Answer

260 sec.

Work Step by Step

$P_{85}$ is the value where 85 % of the values are smaller than $P_{85}$. 85% of the data here is: $24\cdot0.85=20.4$, therefore $P_{85}$ is the 21st value (the first integer at least 20.4), which is 260 sec..
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