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 ...
divides the bottom half of the data into two halves, and the upper quartile \({Q_3}\) also divides the upper half of the data into two halves. The interquartile range is \(17 - 7 = 10\).