Parking at a Large University Can Be Extremely Difficult at Times

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 ʺLo
95%ʺ and ʺUp 95%ʺ refer to the endpoints of the desired confidence interval. $$\begin{array} { l l c c c c } \text { Variable } & \text { N } & \text { Lo 95\% CI } & \text { Mean } & \text { Up 95\% CI } & \text { SD } \\\text { Parking Time } & 338 & 9.1944 & 10.466 & 11.738 & 11.885\end{array}$$ 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 decrease their confidence level.
B) The university could increase their confidence level.