Two histograms showing the number of pets owned by boys and girls in a science class are each skewed left. Which measure of variability should be used to describe the data?

For skewed data, the interquartile range (IQR) is the appropriate measure of variability because it describes the spread of the middle 50% of the values and is less affected by extreme values. Standard deviation is generally better suited to roughly symmetric data. The correct choice is interquartile range.

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