Category Archives: Stats Theory

Stats Theory

Mid/Late-Game Performances: Win Rates From Ahead, Even, and Behind

Note: Scroll down to the data if you want to skip the introductory theory talk!

A team’s early-game performance is relatively easy to measure. We have a wide variety of metrics, like gold different at 15 minutes, first blood/dragon/Tower, and more.

It’s much more difficult to measure a team’s performance in the mid and late game, because those parts of the game are so heavily influenced by what has happened in the early game, but that’s exactly what I’m trying to do here. Continue reading Mid/Late-Game Performances: Win Rates From Ahead, Even, and Behind →

Stats Theory

Win Bias and Damage Per Minute

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In response to a Reddit post yesterday which listed the top Damage per Minute numbers from the NA/EU playoffs, one Redditor made this comment:

“This data is very skewed because CLG only won and never lost. It would be a lot less so if you just compared DPM from wins or just losses.”

I thought this was worth responding to in a bit more detail, to help people understand the concept of “win bias” and why, in my opinion, DPM isn’t one of the stats it heavily affects. Here’s an expanded version of what I wrote.

In League of Legends, there are some statistics that are a consequence of winning, rather than a cause of winning. We can call these stats “win-biased”. Continue reading Win Bias and Damage Per Minute →