Thought I would offer up this little tidbit to give you some reading material while you are waiting for the server restart and your chance to play Malinovka for the first time or to start grinding the new line of British mediums.
The final bit of information I can pull from my sample of games involves matchmaking. Specifically, I was curious to see what effect the overall Win Rate (WR) of a team would have on their chances of winning a battle.
From the larger dataset I gathered I was able to look at the results of 35 matches played from Tiers 2/3 to 10. I excluded battles with Tier 1 vehicles because – well, because it’s Tier 1. Only one of these matches resulted in a draw. The analysis did not take into account the mix of vehicles (heavy, medium, TD), AFK’s, platoons, or fail platoons (too complicated and too small of a dataset).
Here’s what I found:

Mean WR 
Median WR 
WR Range 
Mean Tier 
Wins 
50.59 
50.80 
35.571.1 
6.39 
Losses 
48.54 
48.24 
32.368.4 
6.35 
Graphs of the Data

The winning teams’ mean Win Rate was significantly higher than that of the losing side.

The team with the higher mean Win Rate won 83% (29/35) of the matches; the team with the higher median Win Rate won 89% (31/35) of the matches.

There was no significant difference in the mean Tier composition of teams

The one draw had teams with average Win Rates of 47.04 and 48.71 and median Win Rates of 46.65 and 48.97, respectively.
I would not take these results to be completely representative of all WoTBlitz matches for two primary reasons:

the sample size is a bit on the small side.

I can’t control for is the effect of my own participation. I played in each one of the matches and obviously had an impact on the overall results. It seems possible that my participation and overall WR (54%) could (and likely did) bias these results. In that respect the mix of players in each match is not completely random. But, given that I am only one of 7 players on a team (and am a long way from being a dominant player) I suspect the overall impact is minimal.
Regardless of these factors, there is no doubt that there is a strong pattern that is well outside of the bounds of random variation: in a limited sample of my own battles my team’s overall win rate played a very large role in the outcome of a battle. This really isn’t that earthshattering of a revelation – its pretty much common sense. I was surprised, however, with how strong the relationship was.
So what might account for the ~1015% of the time that the lower WR teams were victorious? This is where a host of other relevant factors likely play a role: tank up grades, crew training, ability of a particular player with the tank they are using, the map, lag, mix of vehicles, platoons, fail platoons, AFK’s, etc. These are very difficult if not impossible to account for and measure.
Just a final note – this is not in any way intended to be an argument for or against the current matchmaking system and whether or not player ability should also be used when setting up matches.
Thanks and I hope to see you on the battlefield soon!
For those of you who are interested – the actual statistical analyses are in the spoiler below.