Answer
3383.
Work Step by Step
Using the table: $z_{\alpha/2}=z_{0.05}=1.645.$ Hence the sample size:$n=\frac{z_{\alpha/2}^2}{2E^2}=\frac{1.645^2}{2(0.02)^2}\approx3383.$
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 9 - Inferences from Two Samples - 9-2 Two Proportions - Beyond the Basics - Page 453: 21
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