Answer
$2.5$
Work Step by Step
In the previous problem, we have found our 95 percent confidence interval to be between $67.5$ and $72.5$.
Because the value of people who said yes is $70$ percent, we can see that the margin of error is $2.5$.
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 7 - Estimates and Sample Sizes - Review - From Data To Decision - Page 377: 2
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