Answer
7/15 = 0.47
Work Step by Step
Mean = 46.3. Within 3 years of the sample mean implies:
$43.3 \leq x̅ \leq 49.3$
Using the sampling distribution from part c, we have:
$P(43.3 \leq x̅ \leq 49.3) = 7/15$
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 8 - Section 8.1 - Assess Your Understanding - Applying the Concepts - Page 412: 31e
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