Question

The data shows the number of grams of fat found in 9 different health bars.12, 14, 16, 16.5, 11, 18, 18, 14, 20 What is the IQR (interquartile range) for the data?
9
5
16
18

Answer 1

From the given data set, the get the IQR we rearrange the set in ascending order first.
11,12,14,14,16,16.5,18,18,20
the first quartile =14
The upper quartile=18
then
IQR=Q1-Q3
=18-14=4