Distribution of evolutionary masses for the stars in Fig. 11 that occupy Box 2 (left) and the remainder of stars (right). Black crosses indicate data points. The middle column in each half of the diagram shows the median of the sample in red, where the boxplot indicates the 0.25 and 0.75 percentiles with whiskers extending out no further than 1.5 times the inter-quartile range. The right column indicates the weighted average and standard deviation (in parentheses) of the sample in blue. Evolutionary masses are calculated using the Bonnsai tool (Sect. 6.1).