Answer
See below.
Work Step by Step
The $X^2$ test can only test for difference, thus we can use the $z$ test, because the $z$ test can test for increase and decrease.
The Basic Practice of Statistics 7th Edition
by Moore, David S.; Notz, William I.; Fligner, Michael A.
Published by
W. H. Freeman
ISBN 10:
146414253X
ISBN 13:
978-1-46414-253-6
Chapter 25 - Two Categorical Variables: The Chi-Square Test - Chapter 25 Exercises - Page 603: 25.34d
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
