Arif
-
07:29:29 am on August 22, 2010 | # |
Drawing boxplot from the following data, whiskers are determined from 1.5 IQR
no datum drawn as 1 0.026 outlier 2 0.048 whisker low 3 0.070 Q1 4 0.072 5 0.076 Q2 6 0.084 7 0.086 8 0.099 Q3 9 0.102 10 0.103 whisker high Outlier
0.026 becomes outlier because 1.5IQR boundary (IQR = Q3 – Q1 = 0.02908) for the lower boundary is Q1 -1.5IQR = 0.0404, hence whisker is 0.048 which is more close to the box inside making 0.026 outlier.
boxplot-basic-concept-example.png