The Length of Time It Takes College Students to Find

question 111

Multiple Choice

The length of time it takes college students to find a parking spot in the library parking lot follows a normaldistribution with a mean of 6.5 minutes and a standard deviation of 1 minute. Find the probability that arandomly selected college student will take between 5.0 and 7.5 minutes to find a parking spot in the librarylot.

• A) 0.7745
• B) 0.4938
• C) 0.0919
• D) 0.2255

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Definitions:

Population Variance

A measure of how data points in a population are spread out from the mean.

T Distribution

A type of probability distribution that is symmetrical and bell-shaped like the normal distribution but has heavier tails, used especially for small sample sizes.

Degrees Of Freedom

The total count of values that can change in the ultimate calculation of a statistical figure.

Standard Normal Distribution

A bell-shaped distribution that has a mean of zero and a standard deviation of one, used in probability and statistics.