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 - Page 791: 9


$\overline{x} = 4.714285714$

Work Step by Step

To solve for the mean of the given frequency distribution, perform the following steps: (1) Multiply the score and the corresponding frequency. (Refer to the $fx$ column in the attached image below.) (2) Add the products in step (1) to obtain $132$. (3) Add the frequencies to obtain $28$. (4) Divide the result in step (2) by the result in step (3) to obtain: $\overline{x} = \dfrac{132}{28}=4.714285714$
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