{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) which has had no bearing ...

Whiskers extending from the box indicate variability outside the upper and lower quartiles. Outliers that differ significantly from the rest of the dataset may be plotted as individual points beyond ...

To find the lower quartile, use the same method as for the median, except use \(\frac{1}{4}\) of the total frequency rather than \(\frac{1}{2}\). To find the upper quartile, use \(\frac{3}{ ...