[IKE]

So, I did a quick scrape through our data from Grand Blanc. I found a handful off questionable values, but most of them were realtively low impact to averages.

The highest delta between OPR and what our scouts provided was 13 points. This particualr instance was 13 points favorable to that particular team. This team also had a few of the values I question as it appears that they did not score outside of auton in their final 2 matches (which I find hard to believe, but will verify later). This was one of the top scoring teams at the event.

The highest "unfavorable" OPR reading was 8.8 off from the scouts average. This particualr team also had some questionable data for one of their matches. Adjusting the values for that match to what I beleive were more accurrate (second scouting source), this delta went down to 5, and a different team became the most disadvantaged at 7.0. The team with this delta was a lower scoring team that OPR seems to be especially harsh on when comparing their 9.5 average to their 2.3 OPR.

To get average error, I took the absolute value of the error and found the average to be 3.5 pts, and the median error to be 2.9 pts.

Average OPR for the event was 24.8 and median OPR was 18.8. Thus the average error and median error for this event seems to be coming in at 15-16%.