Here's a look at how runners' speeds were distributed during each race of SART 2019. For each race, the median / 50th percentile speed is scaled to 1, so a speed of 1.4 corresponds to running 40% faster than the median speed for that race.
First, a point density plot - each point in each race corresponds to a specific finisher. Horizontal axis within a race bar is meaningless.
Alternatively, a histogram density chart which loses individual performance visibility but makes the overall distribution more visible:
And lastly a quartile box and whisker plot, where the central box depicts the speed range from the 25th percentile to the 75th percentile. That is to say, 50% of all competitors had speeds in that range. The whiskers cover the top 25% and bottom 25%:
No surprise that the final has the widest spread for the middle half of competitors - from 82% to 134% of median speed.
The Time Trial featured the tightest central pack - 86% to 113% covered half the runners!
It's also notable that the boxes are all essentially symmetrical about the median speed, except for Round 5. I think this means that mid pack runners were more mistake prone on Round 5 than either the faster or slower groups.
Thanks again everyone who made this possible!