The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 22 - Inference about a Population Proportion - Chapter 22 Exercises - Exploring the Web - Page 538: 22.46b

Answer

See below.

Work Step by Step

The sample proportion is the number of successes divided by the sample size: $p_0=\frac{x}{n}$ Hence here: $\hat{p}_F=\frac{x}{n}=\frac{422}{528}\approx0.7992$ $\hat{p}_F=\frac{x}{n}=\frac{154}{272}\approx0.5662$
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