In the data set below, what is the interquartile range?
13 47 53 53 55 62 64 66 72
To find the interquartile range, we first need to find the value of the first quartile (Q1) and the third quartile (Q3).
Q1 = median of the lower half of the data set = 53
Q3 = median of the upper half of the data set = 64
Interquartile Range (IQR) = Q3 - Q1
IQR = 64 - 53
IQR = 11
Therefore, the interquartile range of the data set is 11.