Find the inter-quartile range of 1, 3, 4, 5, 8, 9, 10, 11...
Find the inter-quartile range of 1, 3, 4, 5, 8, 9, 10, 11, 12, 14, 16
6
7
8
9
Correct answer is C
Q1=14 (N + 1)th
14×12th no.
= 3rd no (≅ 4)
Q3=34 (N + 1)th
= 34 x 12th no.
= 9th no. (≅ 12)
Hence, interquartile range
= Q3−Q1
= 12 - 4
= 8
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