$$\text { TABLE 12-8 }$$ The Director of Transportation of a Large Company Is Interested

question 2

Multiple Choice

$$\text { TABLE 12-8 }$$ 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:
$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Before }$
$\begin{array}{l|l|c|c|l}\hline & & \text { Use } & \text { Do Not Use } & \text { Total } \\\hline \text { After } & \text { Use } & 27 & 44 & 71 \\\hline & \text { Do Not Use } & 33 & 25 & 58 \\\hline & \text { Total } & 60 & 69 & 129\end{array}$

She will use this information to perform test using a level of significance of 0.05.
-Referring to Table 12-8, 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) Wilcoxon rank sum test
• B) Z-test for difference in proportions
• C) ?²-test for difference in proportions
• D) McNemar test for difference in proportions

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Definitions:

Process-focused Shop

A manufacturing or service setting where operations are organized around particular processes or tasks to improve efficiency and flexibility.

Repetitive Manufacture

A production process characterized by the continuous, sequential production of identical products without significant changes in design or setup.

Crossover Point

The point at which two different production, operation, or financial methods result in the same cost, beyond which one method becomes more cost-effective than the other.

Service Productivity

Service Productivity refers to the efficiency with which a service sector business or organization turns inputs (like labor, capital, and materials) into services, measuring output in relation to input.