Stats: Data and Models (3rd Edition)

Published by Pearson
ISBN 10: 0321692551
ISBN 13: 978-0-32169-255-9

Chapter 19 - Confidence Intervals for Proportions - Exercises - Page 473: 2


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The margin of error is $3\%$, thus the sample proportion varies on average by $3\%$ from the population proportion.
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