5  Interpreting Boxplots


December 15, 2023

5.1 Interpreting Box Plots

Each of the following graphs display the sampling results for a specific parameter, such as arsenic. Within these graphs, a box and extending lines represent the results reported at each sampling site. A horizontal line within the box corresponds to the median of the data. The box contains 50% of the data and the vertical lines display the minimum and maximum values. Any data points that fall outside of the acceptable range are outliers and are portrayed as small circles (Figure 5.1).

Figure 5.1: Components of a box plot