Question

What is the interquartile range of this data set 2,5,9,11,18,30,42,48,71,73,81

Answer 1

First, find the median: 30

Then, find the median of the 2 sides from 30 (Q1 and Q3)

The middle value between 2 and 18 is 9. The middle value between 42 and 81 is 71. Now, just subtract 71-9.

The IQR is 62 :)