Answer
2.5
Work Step by Step
In the previous problem, we found our 95 percent confidence interval to be between 67.5 and 72.5. Since the value of people who said yes is 70 percent, we see that the margin of error is 2.5.
Essentials of Statistics (5th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0-32192-459-2
ISBN 13:
978-0-32192-459-9
Chapter 7 - Estimates and Sample Sizes - Review - From Data to Decision - Page 371: 2
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