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17 January, 12:54

How to solve inter quartile range of the given data set? 3,9,12,15,16,18,21

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  1. 17 January, 13:21
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    Step-by-step explanation:

    3,9,12, (15),16,18,21

    mean (middle number) = 15

    Q1 = 9 ... the middle number of the numbers before the mean

    Q3 = 18 ... the middle number of the numbers after the mean

    interquartile range (IQR) = Q3 - Q1 = 18 - 9 = 9 <==
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