At a large community college, full-time students enroll in a minimum of 12 credi

Question

At a large community college, full-time students enroll in a minimum of 12 credit hours and a maximum of 18 credit hours each semester. Students must petition for approval to enroll in more than 18 credit hours. The histogram shows the distribution of credit hours for 31 randomly selected full-time students.

Which is the most appropriate description of how to determine a typical number of credit hours for full-time students?

A. The median is halfway between the smallest and the largest number of credit hours, so the median is 17. Since the bulk of the data is to the left of the median, the mean is pulled left. The mean is about 16.

B. Students must petition for approval to enroll in more than 18 hours, so any values above 18 are outliers and should be disregarded. This makes the data approximately symmetrical with a central peak. Therefore the mean and the median are both about 15, and both are appropriate representations of the typical number of credit hours.

C. The median is 15. The distribution is skewed right, so the mean will be greater than the median. For this reason, the median is a better representation of the typical number of credit hours.

which one is the right answer?

Explanation / Answer

C. The median is 15. The distribution is skewed right, so the mean will be greater than the median. For this reason, the median is a better representation of the typical number of credit hours.

In a right skewed ditribution, median is a better representative of the population.

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