Watching Dave's videos (I know he has gone beyond these basics) I have learned that what this basic screen tells us, is looking at all the lines in the "shown" past performances, that there is a 90% chance that the horse will run between these two speed ratings in this race. Looking at the 3 horse Mrs. Katz, we expect her to run between an 80 and an 85 speed rating today.
Attachment 54245
There is a book out called, I believe,
How to Measure Anything. Statically, with 10 events if you take the 4th lowest, here 80, and the 3rd highest, here 85, there is a 90% statistical chance the horse will run between those two scores. You can see in her last two races she ran a 90 and an 87, so you can expect her to run to the upper limit of her expected range. Here is a look at all the horses in the race. Obviously, this is not exact. One needs to handicap the horse further. BUT, it is a look at the horses entire shown past performances and is a point of information for our handicapping. Watch how often this helps our decision making.
"How to Measure Anything. Statically, with 10 events if you take the 4th lowest, here 80, and the 3rd highest, here 85, there is a 90% statistical chance the horse will run between those two scores"
Are you sure about that???