AngryPixie,

Are these the ranked tips and the strike rate ? ie the top rank win 28 from 91, the top two ranked are 39 from 91,etc.

If so can I suggest you do one more analysis. Break it down by race for the top 3 to top 5 and see if there is a difference in the strike rate in the first few races (races 1 to 4) compared to the later races (5+). I think you might be surprised with the result. I say this without having done any analysis on your results though.