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: 22.46c

Answer

$\approx0.692$

Work Step by Step

The sample proportion is the number of successes divided by the sample size: $p_0=\frac{x}{n}$. Also we use part b). Hence here: $\hat{p}=\frac{x}{n}=\frac{0.7992\cdot0.54\cdot800+0.56622\cdot0.46\cdot800}{800}\approx0.692$
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