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DPChallenge Forums >> General Discussion >> Voting Stats - Average (p) vs. Average (np)
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Showing posts 26 - 29 of 29, (reverse)
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02/24/2011 09:48:00 AM · #26
Originally posted by kirbic:

Originally posted by NiallOTuama:

...Maybe 6 hours of programming and three days of scraping the website....


Ah, that's why my 'pooter was making that scraping sound every time I logged in!


really trying to resist the urge to make a bathroom joke
02/24/2011 10:37:17 AM · #27
Ok. So I wanted to see if there was a difference between the participants and non-participants voting depending on the scoring range. Here's what I found:

Range: p/np difference (+ve means p scored lower than np)
1.000-2.000: -0.058
2.000-3.000: 0.231
3.000-4.000: 0.297
4.000-5.000: 0.302
5.000-6.000: 0.276
6.000-7.000: 0.284
7.000-8.000: 0.239
8.000-9.000: 0.429
(That participants are so 'against' very high ones (by 0.5 nearly) is more due to the small amount of data for range.)

In conclusion... the p/np difference doesn't appear to change drastically until you reach the extremities of the scoring boundaries. The four around the edge aren't as well defined as the others, unfortunately.

Here are the individual histograms for the ranges.
1-2:
2-3:
3-4:
4-5:
5-6:
6-7:
7-8:
8-9:

Overall histogram:

02/24/2011 11:08:06 AM · #28
My take would be that there is some "scale compression" for participants vs. non-participants. I think that participants might be more likely to base their vote on a "DPC scale" in which case they would rarely award a 1 or a 10. This would lead to the observed behavior.
If we disregard the data at the extremes, the deviation is almost constant with an average of 0.272
02/24/2011 11:34:27 AM · #29
Originally posted by kirbic:

I do have to say to those who look at the statistical plots and wonder how long it took, "not that long."


Yeah, but you haven't factored in the time you spent discovering the issue, thinking about how to address it, designing the plotting programs...

Though not a statistical interpretation of the numerical variations, I believe that those that know how something is done are far more critical and reserved about their praise than people who only see and experience the final results. For example, movies: when you know how the magic is done, you tend to look more deeply and critically at the finished product than someone who has a "Santa Claus" experience of movies (ie. believes in magic). Or even more literally, watching a close-up magician. For those of us who don't know magic, it's a mindblowing, "how did he do that" experience. For other magicians, the experience is tempered by their recognition of an effect and whether or not they think they can do it better.
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