Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 7 - Confidence Intervals and Sample - 7-3 Confidence Intervals and Sample Size for Proportions - Exercises 7-3 - Page 395: 2

Answer

a. $\hat p=0.58, \hat q=0.42$ b. $\hat p=0.45, \hat q=0.55$ c. $\hat p=0.68, \hat q=0.32$ d. $\hat p=0.55, \hat q=0.45$ e. $\hat p=0.12, \hat q=0.88$

Work Step by Step

a. $\hat p=\frac{35}{60}=0.58, \hat q=1-\hat p=0.42$ b. $\hat p=\frac{43}{95}=0.45, \hat q=1-\hat p=0.55$ c. $\hat p=0.68, \hat q=1-\hat p=0.32$ d. $\hat p=0.55, \hat q=1-\hat p=0.45$ e. $\hat p=0.12, \hat q=1-\hat p=0.88$
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