Measures of Center and Dispersion

Overview

Goal. Compute the mean, median, mode, range, and interquartile range of a data set, and choose the measure of center that fits the data.

Mean (definition). The sum of the values in a data set divided by the number of values.

Mean, median, mode, range, quartiles and the IQR — and what an outlier does to each.

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Watch the lesson video.

Goal. Compute the mean, median, mode, range, and interquartile range of a data set, and judge which center describes a set with an outlier.

Mean (definition). The sum of the values in a data set divided by the number of values.