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Random Mirror Match Up Percentages Off - Page 9

Forum Index > SC2 General
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justdweezil
Profile Joined July 2009
United States186 Posts
April 11 2011 09:52 GMT
#161
I'm shocked by how few people understand stats (for example, neglecting the face that players can veto certain maps favored by certain races), but either way, I'm posting my numbers:

ZvZ: 26
ZvT 17
ZvP: 26

Soleron
Profile Blog Joined September 2010
United Kingdom1324 Posts
April 11 2011 09:58 GMT
#162
Once again. Read what i wrote and think again. Also, sit down and try flipping a coin and generating random 1/2-1/2 chances with your favourite compiler's random generator. Or if its not enough for a show, try with a d20 die. I know what im talking about, i know that random cannot be proved to be random, and that pseudo random generators are KNOWN to NOT be random (thats why we call them pseudo, they just look like one), if you know the seed you can tell the whole series, but thats not the point. The point is, usually they generate more even distribution. If you dont beleive me, try it. If you dont try it, hold back your "arguments".


That is true for the most common pseudorandom generators, but it isn't a fundamental property of them. One could easily write a pseudorandom generator that is less even than true randomness.
Dezire
Profile Joined December 2010
Netherlands640 Posts
April 11 2011 10:07 GMT
#163
PVPVPVPVPVPVPVPVPVPVPVP all day long x]
BoxeR, HuK, IdrA, Minigun, MVP <3
Pred8oar
Profile Joined March 2011
Germany281 Posts
Last Edited: 2011-04-11 11:35:11
April 11 2011 10:13 GMT
#164
question: should it really be 33% ? becuase i think that if u were up against one race all the time it would be 33% but because the race uof ur opponent differs from game to game it should be 11% or am i wrong? just had that thought popping up in my head

the race u spawn as also differs (another 33% chance)
Jinsho
Profile Joined March 2011
United Kingdom3101 Posts
April 11 2011 10:46 GMT
#165
No, that's not right. It's 33% for each race because there are three races each with the same probability to be encountered.

Even if the race of your opponent had to change after each game, which it does not, the chance to see each race would still be 33%, because you still have only three races and all three are equally likely.

You should try and think about it in more detail.

Gigaschatten
Profile Joined January 2011
Germany79 Posts
April 11 2011 11:47 GMT
#166
First of all the amount of games played is not high enough to have a statistical relevance. Even if the base would be high enough for a single person you would most likely NOT see a 33% distribution. Only the average number of games from a lot of persons could in theory show a 33% distribution.

However this takes into account the assumption that the all three races are per se distributed evenly among all players (33% Toss, 33% Terran and 33% Zerg) which is definately not the case. You are going to probably see more terran than zerg players out there (pure assumption) - since Terran relates more to humans than the other two races.

In addition the race distribution will certainly differ even among the different leagues from copper to master.

Despite your individual encounter of a lot of mirrors you can not extrapolate from the current amount of information on how the random-matchmaking works in terms of providing you mirror oponents.

I would say that's pure statistical luck. :-)
I said good day, sir! Axe-actly!
SeaSwift
Profile Blog Joined February 2011
Scotland4486 Posts
April 11 2011 12:15 GMT
#167
On April 11 2011 12:09 Icx wrote:
Race: Zerg


PLEASE read the OP, people!

He is looking for RANDOM players playing vs other RANDOM players.

Race distribution -> superfluous.
DooMDash
Profile Joined May 2010
United States1015 Posts
April 11 2011 14:22 GMT
#168
I know the OP is taking about random, but I've been looking at my sc2gears stats for ladder, and this DOES NOT include my 9 in a row tvt ladder streak a few days ago.

[image loading]
S1 3500+ Master T. S2 1600+ Master T.
NinjaDrone
Profile Joined June 2010
United States97 Posts
April 11 2011 20:09 GMT
#169
Over 500 games and the stats are a little high but within tolerances. I'd like to get the number over 1,000 games before I would feel that I would have a sample size where I could draw some real results. Thanks for everyone's help.
wherebugsgo
Profile Blog Joined February 2010
Japan10647 Posts
April 11 2011 20:18 GMT
#170
Why do people keep posting when they play one race? If you play ONLY P, T, or Z, the amount of mirrors you get should be the same as the proportion of users of that race at your level.

However, all random players should have a roughly 1/3 rate of mirrors (TOTAL) because it only matters what race you roll. From the statistics that RANDOM players have posted (such as myself) there is no evidence for anything weird.

This thread needs to be closed.
Neo.NEt
Profile Joined August 2010
United States785 Posts
April 11 2011 21:29 GMT
#171
On April 11 2011 19:46 Jinsho wrote:
No, that's not right. It's 33% for each race because there are three races each with the same probability to be encountered.

Even if the race of your opponent had to change after each game, which it does not, the chance to see each race would still be 33%, because you still have only three races and all three are equally likely.

You should try and think about it in more detail.



^^ What this guy said.

Also it doesn't matter if every single person plays Toss... random is still gonna get mirrors 33% of the time. Sometimes you go to Vegas, bet on black every spin, and walk out a millionaire. It happens.
Apologize.
wherebugsgo
Profile Blog Joined February 2010
Japan10647 Posts
Last Edited: 2011-04-12 23:14:58
April 12 2011 23:12 GMT
#172
Just for kicks, I took a random number generator and ran it for 500 numbers, choosing only between 1 through 3 each time. Call number 1 the situation in which you land a mirror, 2 and 3 the situations in which you do not. The results:

Trial 1:

144 ones
184 twos
172 threes

28.8% chance of hitting 1/random

Trial 2:

133 ones
187 twos
180 threes

26.6% chance of hitting 1/random

Trial 3:

161 ones
186 twos
153 threes

32.2% chance of hitting 1/random

Trial 4:

180 ones
137 twos
183 threes

36% chance of hitting 1/random

Trial 5:

183 ones
144 twos
173 threes

36.6% chance of hitting 1/random

So...if you're getting stats of 37.5% out of a sample size of roughly 500, I don't think anything is abnormal. Twice the number generator gave me a result that is +3% of the expected 33%, once at -4.2, and once at -6.4, which is bigger than the difference you see in the stats that were provided to you.

I don't think you're going to find anything abnormal.

EDIT: Also, since the choice of "1" as the situation in which you land a mirror was completely arbitrary, had I chosen 2, you would've ended up with a result in trial 2 that gives you a 37.4% chance of a mirror, and one in trial 3 that gives you 37.2%
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