I teach Stats A level - what are you wanting to compare? I'm unsure what you are asking ....
To be honest I am not absolutely sure!!
My dd's CATs scores were 117 (quant), 119 verbal), 131 (NVR) and 122 (mean). She had no end of Y5 SAT scores (independent school) but predicted Y6 Reading 5c/6c, Maths 5a, Writing 5c.
They did not doubt she could get level 5's, but said academic results in school consistent with exam score. Unsuccessful review.
It seems to us they are looking for much higher CAT scores - but on what basis? How do these %iles compare to the 11+ - which is supposed to select the top 30% in the county? The link to the CATS booklet shows these CAT scores are top15% or so at their lowest!!
I've gotta go out now - and now sure if what I am saying makes sense? Does it?