Box plots are an effective way to compare distributions of interval data. To create side-by-side box plots comparing the distributions of salaries for the American and National Leagues, follow these ...

Comparing distributions We have already drawn a box plot for Mrs Galbraith's English test results. Shown below is a box plot displaying the results of Mr Wilson’s Maths test results.

Box plots A box plot is a diagram which provides a quick visual summary of the distribution of a data set. It makes drawing conclusions easier and is useful for comparing two sets of data.

In these examples it is shown that p-p plots representing different experimental conditions or patient populations allow scale-invariant comparisons of treatment effects but q-q plots do not; that the ...