Parking at a Large University Can Be Extremely Difficult at Times

question 4

Multiple Choice

Parking at a large university can be extremely difficult at times. One particular university is trying to determine the location of a new parking garage. As part of their research, officials are interested in estimating the average parking time of students from within the various colleges on campus. A survey of 338 College of Business (COBA) students yields the following descriptive information regarding the length of time (in minutes) it took them to find a parking spot. Note that the "Lo 95%" and "Up 95%" refer to the endpoints of the desired confidence interval. $\begin{array}{llcccc}\text { Variable } & N & \text { Lo 95\% CI } & \text { Mean } & \text { Up 95\% CI } & \text { SD } \\\text { Parking Time } & 338 & 9.1944 & 10.466 & 11.738 & 11.885\end{array}$
University officials have determined that the confidence interval would be more useful if the interval were narrower. Which of the following changes in the confidence level would result in a narrower interval?

• A) The university could increase their confidence level.
• B) The university could decrease their confidence level.

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Definitions:

High-low Method

An approach used in cost accounting to determine the variable and fixed components of a cost by analyzing the highest and lowest levels of activity.

Utility Cost

The expense incurred for using utilities such as electricity, water, and natural gas in a business operation.

Total Cost

The sum of all costs associated with the production and delivery of a company's products or services, including both fixed and variable costs.

Manufacture Units

The process of converting raw materials into finished goods on a large scale, measured by units produced.