## Elementary Statistics (12th Edition)

Published by Pearson

# Chapter 7 - Estimates and Sample Sizes - 7-2 Estimating a Population Proportion - Basic Skills and Concepts: 8

2.05.

#### Work Step by Step

$1-\frac{\alpha}{2}=1-0.02=0.98.$ $z_{\frac{\alpha}{2}}$ is the z score belonging to the probability of $1-\frac{\alpha}{2}=0.98$, which is 2.05.

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