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Discrepancy at Chesapeake, Israel, Waterloo?
I looked over the data from all of the regionals of the first 4 weeks after getting back from Chesapeake this weekend. At Chesapeake, there seemed to be an occasional problem where the middle blue alliance station would not establish communication with the robot. I was not surprised to see the data reflected this, with the Red alliance winning 61.5% of the qualification matches. I was surprised to see similar results at both the Israel and Waterloo regionals. Did you guys have a similar problem at your regionals?
Here is the data: Code:
Regional Blue Win % Red Win % Difference |
Re: Discrepancy at Chesapeake, Israel, Waterloo?
Very interesting information. But I am not really liking the "error" name for the difference. How about use the word "difference"? sounds better.
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Re: Discrepancy at Chesapeake, Israel, Waterloo?
Agreed. Error makes it sound like Percent Error, which would be a whole different thing entirely. I edited the post.
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Re: Discrepancy at Chesapeake, Israel, Waterloo?
Putting your %'s into minitab and doing a simple capability sixpack, the distribution has a P value of .59, which strongly suggests you have a normal distribution.
Looking at the tails of the normal curve, only a couple values fall just outside that range, and you have both a long term and short term capability of well above 2. There is a bimodal distribution, but this sample size of regionals is somewhat limited. With this limited sample size, my answer currently would be "It's well within expected limits". Yeah, I know, it doesn't answer your question really. But everything points to normal statistical variation in Team winning percentage. |
Re: Discrepancy at Chesapeake, Israel, Waterloo?
Waterloo only had 34 qualification matches... So I am not surprised it is a bit off.
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Re: Discrepancy at Chesapeake, Israel, Waterloo?
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Also, @ the data from minitab: Are you sure its not looking at it on too large of a scale? The data is clearly pretty linear up until the 3% jump. |
Re: Discrepancy at Chesapeake, Israel, Waterloo?
Any statistician will tell you that statistics never conclude anything - they are merely interpreted to mean something. You can, generally, argue any point you like if you know how to twist them well enough.
However, in this case, I think it's pretty fair to say you've simply found the tails of the curve. Someone's got to have the highest and lowest scores, after all. |
Re: Discrepancy at Chesapeake, Israel, Waterloo?
I think it's just coincidence, it's not like one alliance color has more at every single regional. The discrepancies happen.
![]() -Vivek |
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Re: Discrepancy at Chesapeake, Israel, Waterloo?
My team was at Chesapeake. We were mostly on the blue alliance. As you can see below.
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Re: Discrepancy at Chesapeake, Israel, Waterloo?
I was an FTAA at Chesapeake and can tell you the most of the problems with "dead" robots were operator error. The most common was robots going on the field with the cRio un-plugged from the radio. The FTA had made it clear that once the gates were up you could not correct things like that on the field. We even announced it in the pits to no avail.
Unfortunately I also mentor team 2199 who lost a very good chance at being regional champion due to the robot in Blue-2 de-linking after autonomous. The weird thing is that it exhibited the same behavior in the previous match but in Blue 3 lending credence to the argument that it was a robot problem. One thing I found that was fairly consistent was the flat black ethernet cable provided in the kit was problematic. teams that had swapped it out for real twisted pair ahd almost no problems with communication. |
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On another note do these stats include eliminations? If so then the data won't be accurate because in eliminations the higher seed is in red and in theory more likely to win. |
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