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Martin Sleziak
Martin Sleziak
12:36 AM
@JohnJiang Yes, that's true. I have mentioned it just as an example. (It was one of the attempts to create a reading group in chat.)
Sorry for the chaos in the comments. I should have simply posted the comment as I did now - instead of suggesting to delete the comment after you see it and complicating things.
Let us hope you get some response on MO.
Maybe later I can offer bounties on the Mathematics questions (How to organize math study groups online for long-distance collaboration? and How do I find partners for study?) - just to see whether that brings some new interesting answers.
 
Martin Sleziak
Martin Sleziak
12:57 AM
BTW I noticed this - relatively recent - answer:
1
A: How do I find partners for study?

AddemThere is this site: https://www.reddit.com/r/STEM_Study_Groups/ And this: https://my.cuddy.app/

 
Martin Sleziak
Martin Sleziak
1:11 AM
Although I am not sure whether either of those links has some useful content.
 
 
1 hour later…
Martin Sleziak
Martin Sleziak
2:18 AM
I though that looking at the total score (rather than reputation) would make the graph more linear - by removing the effect of the suspended users who have reputation 1 despite many posts.
It only worked to some extent.
Since we're looking at users divided by number of posts, perhaps it is good to include also the list of users with most posts: data.stackexchange.com/math/query/1259606/users-with-most-posts
 
 
2 hours later…
Martin Sleziak
Martin Sleziak
3:50 AM
I take it all these "averages" are arithmetic means. Anyone keen to calculate the mode? median? geometric mean? harmonic mean? $\ell^2$-norm? standard deviation? — Gerry Myerson 21 mins ago
@GerryMyerson I think that to do such computations it might be better not to do them directly in SQL, but to download the data and do them in some other software. I think this might be difficult to do in SQL - at least I can say for sure that it is beyond my knowledge of SQL. — Martin Sleziak 2 mins ago
I have at least tried to find median, using the method suggested in Jeff Attwood's answer: Function to Calculate Median in SQL Server. Assuming that I did not make some mistake, median is equal to 1. I guess this was expected. Again, we can restrict this to users above some threshold, for example at least 102 reputation (removing all users who only have repuataion from the association bonus.) — Martin Sleziak 2 mins ago
Milo Brandt usefully summarized the results for averages:
For anyone who doesn't feel like running the mentioned SEDE queries to get current data: as of when I posted this comment (July 6th, 2020), the average reputation was 123.5, the average of those with reputation >=2 was 269.7, reputations >=101 average 543.5, and reputation >=102 average 889.7. — Milo Brandt 5 hours ago
Similarly, by changing the threshold, I get different values of median.
min=1 - median is 1
min=2 - median is 75
min=101 - median is 111
min=102 - median is 169
min=125 - median is 249
min=500 - median is 1053
min=1000 - median is 2135
min=10000 - median is 19522
Again, the suspended high rep user might change this a bit - but median is probably less sensitive to this effect than average.
I have added some other SEDE queries in chat: chat.stackexchange.com/rooms/19138/conversation/… Only a few, since I do not have much time to spend with this right now. This was partly in the response to @AsafKaragila's suggestion to get some breakdown based on number of posts. — Martin Sleziak 45 secs ago
 

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