SCENARIO 12-19
the Director of Transportation of a Large Company $\chi ^ { 2 }$

question 158

Multiple Choice

SCENARIO 12-19
The director of transportation of a large company is interested in the usage of the company's van pool
program. She surveyed 129 of her employees on the usage of the program before and after a
campaign to convince her employees to use the service and obtained the following: She will use this information to perform test using a level of significance of 0.05.
-Referring to Scenario 12-19, the director now wants to know if the proportion of employees who use the service before the campaign and the proportion of employees who use the service after the
Campaign are the same. Which test should she use?

• A) \(\chi ^ { 2 }\) -test for difference in proportions
• B) Z-test for difference in proportions
• C) McNemar test for difference in proportions
• D) Wilcoxon rank sum test

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