Answer
Area under the normal curve is between x = 11.5 and x = 12.5.
Work Step by Step
We subtract and add 0.5 to/from 12 to make correction for continuity.
Statistics: Informed Decisions Using Data (4th Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0321757270
ISBN 13:
978-0-32175-727-2
Chapter 7 - Section 7.4 - Assess Your Understanding - Vocabulary and Skill Building - Page 392: 8
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