The data set represents the responses of 15 students who were asked how many text messages they send in a day.

{55, 50, 54, 51, 52, 53, 50, 51, 2, 56, 55, 56, 54, 57, 55}

The best measure of center for this data set is the, and its value is.

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The best measure of center for this data set is the median. The reason is because this data set contains an outlier.

An outlier is a number a lot bigger or smaller than the rest of the numbers. 2 is the outlier.

This outlier skews the mean; meaning that it will make the average smaller than what is representative of the actual data.

The median is the number in the middle when listed in order.

54 is the median.