The data contained all EU players who played randoms and contained winrate, damage, battles played and rank. Since it had 141419 players, plotting the linear regression took forever, so we have to settle with calculating the linearcoefficents and the R2 values:
What does this tables mean? The Winrate-Battle field is 0.00037. This means that 1000 battles increase winrate by 0.37%. The same field below shows that the R2 value of this fit is 0.035, which is next to nothing. So the amount of battles played doesn’t really predict the winrate. Go figure, mindlessly jumping into games won’t make you better.
The best correlation (0.579 which is still low) is between Damage and Winrate. 1000 damage increase predict 0.2% winrate increase. That doesn’t look much, so I sorted players into 5 groups by increasing damage:
You can see how huge the damage difference between the groups. The lowest damage group has 18.5K, the highest has 53.1K. The winrate of the groups is also significantly (by the size of their standard deviation) differ.
The number of battles somewhat (0.148 R2 is very low) predicts the chance to play ranked at all. About 100 more random games means +1% chance that the player steps into ranked.
However rank itself depends on random battle count barely. So playing a lot doesn’t mean getting good rank. More surprisingly it barely depends on random winrate too. Not only the R2 is very low, but the linearcoefficient says that every % winrate decrease rank only by 0.383, meaning that even if we believe the trendline (we absolutely shouldn’t with that laughable R2), it says that +60% winrate would predict ranking out, which is also nonsense. So those who are good at playing random are not at advantage in getting good rank.
Rank correlates best with random damage (0.2 R2 is low), the trendline says that +10K damage predict -1.7 rank. That’s also not much, but at least gives one hint: being able to farm damage in random predicts rank better than winning in random. This “proves” (remember, horrible R2) that random and ranked battles have completely different metas and strategies from one shouldn’t be carried over to the other, while the ability to do damage somewhat carries over.