If you breakup the plot by any number of categories of technical ability, then there are trends. But to your question, what I was suggesting was that the aggreg

If you breakup the plot by any number of categories of technical ability, then there are trends. But to your question, what I was suggesting was that the aggregations done, especially with categorical data that is averaged, are very susceptible to this. And those clusters are reminiscent of situations like this: https://www.researchgate.net/figure/256074671_fig3_Visualization-alone-does-not-always-suffice-A-shows-the-bivariate-relationship-between https://www.researchgate.net/figure/256074671_fig3_Visualiza... I'd more so like to see this analyzed against who got to the next round (their binary signal), or yes against preferred language, which I suspect will be much more telling. The takeaway from that plot is, there is more to the story.