Remember this only can occur if the data is put into an ordered format. The interquartile range (IQR) is an important concept in the context of constructing and using a box plot. The box plot is a ...

The \(\frac{3{(n+1)}}{4}\) value So the upper quartile (UQ) is 18. The interquartile range (IQR) is therefore 18 - 4 = 14. You will notice that the fact there is an outlier in this data (60 ...

also divides the upper half of the data into two halves. The interquartile range is \(17 - 7 = 10\). (Sometimes we are asked for the semi-interquartile range . This is half of the interquartile ...