The data set represents the number of snails that each person counted on a walk after a rainstorm.12, 13, 22, 16, 6, 10, 13, 14, 12What is the outlier of the data?

Put the data in order: 6, 10, 12, 12, 13, 13, 14, 16, 22. The middle half runs from 11 (the first quartile) to 15 (the third quartile), so the interquartile range is 4. Values more than 1.5 × 4 = 6 below 11 or above 15 are outliers; 22 is above the upper limit of 21. Therefore, 22 is the outlier.

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