Quartiles are the values that divide a data set into quarters: Put the values in order Divide the list into four equal parts The Quartiles are at the divisions The interquartile range shows the range ...

When data is presented as a list of numbers, it can be difficult to interpret. If it is summarised in a diagram it is easier to draw conclusions and to compare with a different data set. A box plot is ...

This study investigated the effects of display characteristics on the bias of estimates of whisker length of two different types of box-and-whisker plots. To test the hypothesis that the bias means of ...