Understand and calculate the mean, median, mode, range and interquartile range (IQR) of a dataset, with and without technology.

gm-u2-t4-s1-d7

Interactive

Mean chases extremes; median resists

manipulative

Drag points on a number line — the mean is pulled by outliers while the median and IQR stay resistant.

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Want a different take?

Already have one and want another angle on this point? Describe what students should notice. Requests are read and acted on.