4, 5, 5, 6, 6, 7, 7, 7, 8, 9, 10
Lower quarter = $\frac{1}{4}(11 + 1)th \ = \ 3rd \ = \ 5$
Upper quarter = $\frac{3}{4}(11 + 1)th \ = \ 9th \ = \ 8 $
Interquartile range = 8 - 5 = 3
raphael answered the question on January 17, 2017 at 05:11
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