Find the interquartile range (IQR) of the data set.

2.6, 3, 4.9, 5, 5, 6, 6, 7.9, 8, 8.2

2.6, 3, 4.9, 5, 5, 6, 6, 7.9, 8, 8.2

(first we find the median)

Median: 5.5

Range: highest value - lowest value

Range: 8.2 - 2.6 = 5.6

Lower quartile: 4.9

Upper quartile: 7.9

Interquartile Range: upper quartile - lower quartile = answer

Interquartile range: 7.9 - 4.9 = 3

Interquartile range (IQR) = 3!

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