Total QBR?

[Smidgeon]

Yea, that's a problem. Even if the formula for QBR is odd, you can check quickly on a web page and do a few "what if's" based on the game. No chance with TQBR.

The other problem is that when you throw in a bunch more variables into the mix, you need a bigger sample size to make sense of it. Will a one game TQBR have any value whatsoever. At least you can get a feel for how well a QB did with the regular QBR for any given game.

And how much of the TQBR is subjective? If the answer is even just one part, then it's a poor statistic.

As for regular QBR, it originally was never intended to be a measurement of one play. It was designed so that even one pass could be measured, but the design was to measure a season's worth of play. Which is why it's interesting to me when the stat is broken down to statistically insignificant measures (i.e. on first passes of the third quarter, in 2009, the QB had a rating of 152.5).

[Upnorth]

Considering this "stat" has a element that captures a backwards cast opinion, not hard numbers, I am suprised it only has a 80% correlation. If I designed a stat that allowed for using opinion on past events I would game it to 95% correlation so I look like a genius! The people who created this "stat" failed even when cheating.