If you press random snapshot easy, you get the same shots everytime.But if I go and look in the feature film I find shots with 600 solves or more.How is it possible that those shots don't come up if you play random snapshot easy?
This question has been asked many times. It is possible because random shots are RANDOM, not just a list of high unsolved shots that go by one by one, without repetition.
quote naut: "Concerning the "same snapshots over and over thing"
The problem is: We can’t reproduce what you encounter. I haven’t solved that many snapshots and every time I hit the random button 100 times, it works just fine.
Could someone out there please use a screen recorder of some kind (I think the new quicktime offers that) and record 5 minutes of random quizzing? If the same snapshots appear *over and over* we should clearly see that. Maybe we can get to the bottom of this."
quote efji: "Thanks naut ! For me the random button does not give the same shot over and over, but the same shotS. It means that I get very often twice the same shot when I press the random button a certain number of time.
I just made some probabilities calculations that explain the phenomenon : The set of shots has about 1500 element (2500-1000 already solved). If I pick n random shots, the probability to get at least twice the same shot is p=1-((1500-1)x...x(1500-n))/1500^n
It means that if you pick 50 shots you have more than 1 chance over 2 to get twice the same shot, and for more than 100 you are almost sure to get duplicate shots.
Of course if you narrow the set by selecting "random easy shot", the probabilities are much higher !
Amazing !
For the same reason, in a classroom of 25 students, you have about 1/2 probability that 2 students have the same birthday. Or, more difficult to check, in a village of a few hundreds of inhabitants, you have an almost sure probability that 2 people have the same number of hairs (bald are excluded!).
edit: I just checked it experimentally : got my first dupe after 52 draws. Maths are powerful :) "
Perceived randomness is totally different from tue randomness.
The only thing that can be changed, is having your own shots excluded from these functions.
Ok, I have to bring this topic up again, and I think I *might* have found the problem. I haven't been very active in the NS/FF in the last couple of weeks, so I could try the following now. I solved as many shots as I could using the "random easy snapshot" button yesterday. After a while only the same 5 shots kept coming up. This was yesterday already, and I just did a little data collection a couple minutes ago. I clicked the "random easy snapshot" button 100 times with the difficulty set on "easy", out of those 100 tries these shots came up: http://whatthemovie.com/shot/91480 24 times (my own) http://whatthemovie.com/shot/91042 23 times (my own) http://whatthemovie.com/shot/92521 18 times http://whatthemovie.com/shot/90984 18 times (my own) http://whatthemovie.com/shot/92476 17 times (my own)
Now after that, I went through the FF manually looking for unsolved shots that have high solves, and found this one for example: http://whatthemovie.com/shot/94056 It has been solved 553 times. From that day alone, there are also several more unsolved shots with 3xx solves, I didn't check any other days, but I'm confident there are a lot more shots with 4xx or even 5xx solves.
So could the problem be: the random generator simply doesn't take all shots that should be made available, and "overlooks" a lot of them? Instead of taking shots out of the complete pool, only a part of the pool is actually looked at? Any ideas/thoughts?
what happens in the following hypothetical situation where I haven't uploaded any easy shots myself and I have solved every other easy shot. What happens when I click random easy snapshot?:)
Damn, where does the time go, it's already been 2 weeks? Naut, you requested some more shot ids, but after your explanation of how shots are determineed easy, medium etc. I don't think there's anything wrong with the random feature anymore. I thought "easy" was determined by current solves, and there were easy shots that had less solves than medium shots, this was the thing that confused me. The shots with 4xx or 5xx solves that I thought should be easy came up with the "random medium shot" button.