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: 22

Answer

234.5 sec.

Work Step by Step

$Q_{1}$ is the value where $\frac{1}{4}=25$ % of the values are smaller than $Q_{1}$. 25% of the data here is: $24\cdot0.25=6$, therefore $Q_{1}$ is the average of the 6th and 7th value, which is (234+235)/2=234.5 sec..
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