A collection of outliers for a single entity in a box and whisker plot. Outliers are grouped in lists for each entity. Lists contain one or more outliers, determined by whether overlaps have occured. Overlapping outliers are grouped in the same list. Each list contains an averaged outlier, which is the same as a single outlier if there is only one outlier in the list, but the average of all the outliers in the list if there is more than one. NB This is simply my scheme for displaying outliers, and might not be acceptable by the wider community.