Stats: Data and Models (3rd Edition)

Published by Pearson
ISBN 10: 0321692551
ISBN 13: 978-0-32169-255-9

Chapter 18 - Sampling Distribution Models - Exercises - Page 451: 9


See below.

Work Step by Step

$\mu=0.5$ $\sigma=\sqrt{\frac{pq}{n}}=\sqrt{\frac{0.5(0.5)}{200}}\approx0.035$ The sample proportion of $0.42$ is $2.28$ standard deviations away, thus it is not that unlikely.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.