Which statements are true about the interquartile range? Select all that apply.

The interquartile range is the upper quartile minus the lower quartile (Q3 − Q1), so both quartiles are needed. First, put the data values in order to find those quartiles. Because the IQR describes the middle half of the data, it is not significantly affected by extreme outliers; a small IQR means that middle half is relatively close together, not spread far from the median.

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