Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 3 - Statistics for Describing, Exploring, and Comparing Data - 3-4 Measures of Relative Standing and Boxplots - Basic Skills and Concepts - Page 125: 26


255 sec.

Work Step by Step

$P_{75}$ is the value where 75 % of the values are smaller than $P_{75}$. 75% of the data here is: $24\cdot0.75=18$, therefore $P_{75}$ is the average of the 18th and the 19th value, which is (255+255)/2=255 sec..
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