If the IQ of a group of 12-year-old children varies between 80 and 140, what is the

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If the IQ of a group of 12-year-old children varies between 80 and 140, what is the range of their mental ages?
For Information: Problem 65.
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College Mathematics for Business Economics Life Sciences and Social Sciences

ISBN: 978-0321614001

12th edition

Authors: Raymond A. Barnett, Michael R. Ziegler, Karl E. Byleen

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