<Li> median (second quartile) Q = 8.5 </Li> <Li> upper (third) quartile Q = 9 </Li> <Li> interquartile range, IQR = Q - Q = 2 </Li> <Li> lower 1.5 * IQR whisker = Q - 1.5 * IQR = 7 - 3 = 4 </Li>

Inter-quartile range is computed on the basis of values of