Parking at a Large University Can Be Extremely Difficult at Times

question 31

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. $$\begin{array} { l l c c c c r } \text { Variable } & \mathrm { N } & \text { Lo 95\% CI } & \text { Mean } & { \text { Up 95\% CI } } & \text { SD } \\\text { Parking Time } & 338 & 9.1944 & 10.466 & 11.738 & 11.885\end{array}$$
Explain what the phrase "95% confident" means when working with a 95% confidence interval.

• A) In repeated sampling, 95% of the sample means will fall within the interval created.
• B) 95% of the observations in the population will fall within the endpoints of the interval.
• C) In repeated sampling, 95% of the population means will fall within the interval created.
• D) In repeated sampling, 95% of the intervals created will contain the population mean.

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Definitions:

Bad Cholesterol

Low-density lipoprotein (LDL) cholesterol, often referred to as "bad" because high levels can lead to plaque buildup in arteries and heart disease.

Liver

The largest gland in the body, located in the upper right quadrant of the abdomen beneath the diaphragm.

Total Cholesterol

The sum of all types of cholesterol in the blood, including low-density lipoprotein (LDL), high-density lipoprotein (HDL), and triglycerides.

Fasting

Voluntarily abstaining from food and/or drink for a specific period for health, religious, or other reasons.