Which measure of central tendency best describes these data?

100, 5, 90, 95, 100
A. the mode only
B. the mean and the median
C. the mean only
D. the median only
I've never really understood central tendency

The central tendency is the measure that best describes the data.

The mean doesn't, because 5 is so much different than the other data.

That leaves you median or mode. Check this site and decide which one fits this data.

http://www.quickmba.com/stats/centralten/

Central tendency is a way to describe the middle or average value of a set of data. There are three common measures of central tendency: the mean, the median, and the mode.

The mean is calculated by adding up all the values and then dividing by the number of values. In this case, the mean would be (100 + 5 + 90 + 95 + 100) / 5 = 78.

The median is the middle value when the data is arranged in ascending or descending order. In this case, the data would be arranged as 5, 90, 95, 100, 100. Since there is an odd number of values, the middle value is 95, so the median is 95.

The mode is the value that appears most frequently in the data. In this case, there is no value that appears more than once, so there is no mode.

Now, looking at the given data (100, 5, 90, 95, 100), we can see that the mean is 78 and the median is 95. So, the measure of central tendency that best describes these data is B. the mean and the median.

To find these measures, you simply need to add up the values and divide by the number of values for the mean, and arrange the values and find the middle value for the median.