Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 12 - Statistics - 12.2 Measures of Central Tendency - Exercise Set 12.2: 16

Answer

median = $95$

Work Step by Step

Arrange the scores from least to greatest to obtain: $30, 70, 90, 100, 100, 100$ There are six numbers. The middle numbers are the third and the fourth scores, which are 90 and 100, respectively. The median will be the mean of these two numbers. Thus, median = $\dfrac{90+100}{2} = \dfrac{190}{2} = 95$
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