Box Plots

Box Plots

1. Another way of displaying data for comparison is by means of a box-and-whisker plot (or just a box plot)

2. Box plots can be used to show the spread of two or more sets of data and make it easier to compare data

3. A box plot requires five pieces of data

   • The lowest value of the set of data
   • The lower quartile of the set of data
   • The median of the set of data
   • The upper quartiles of the set of data
   • The highest value of the set of data

4. REMEMBER - Box plots are always plotted against a scale so that their values can be accurately read and plotted