A-level (age 16-17) school Maths Phys Chem only - and Maths/Algebra I really struggled with - except when I could visualise relationships as a graph.
Mean is what is normally understood as ‘average’ i.e. with 5 observations of 2,5,7,11,15, mean is (2+5+7+11+15)/5 = 8.
Median is the middle observation i.e 7 (but I seem to think, in a tighter-spaced set of observations, would be a bit larger than Mean).
Götz Echtenachersaid “so that one can estimate at one glance where to lop off the top”. To be clear, when you say ‘top’, you mean ‘right hand side’? You make it sound great - what exactly would ‘one glance’ tell you?
Last para v interesting, and does that 20% mean “better, both in ‘most in one component’ and in errors” by means of having EXIF grouping first on then off? Encouraging RC in its (sometimes) “improving Alignment over a series of runs” tendency?