Statistics › Range, quartiles and spread › Interquartile range and outliers
IQR of a six-value data set
Middle school · ●○○○○ 10 pts
Find the interquartile range (IQR) of the data set 4, 7, 9, 11, 12, 20. Use the median of the lower half for and the median of the upper half for , leaving out the middle value when the count is odd.