Q1= 14Q_1 = \;\frac{1}{4}Q1=41 (N + 1)th
14×12th\;\frac{1}{4} \times 12^{\text{th}}41×12th no.
= 3rd no (≅\cong≅ 4)
Q3= 34Q_3 = \;\frac{3}{4}Q3=43 (N + 1)th
= 34\;\frac{3}{4}43 x 12th no.
= 9th no. (≅\cong≅ 12)
Hence, interquartile range
= Q3−Q1Q_3 - Q_1Q3−Q1
= 12 - 4
= 8
