Why "7 out of 10" can mislead

Flip a fair coin ten times and you will get seven or more heads about one time in six. Nothing has changed about the coin. That is just luck in a small sample.

Football trends work the same way. "Over 9.5 corners in 7 of the last 10" is a fact, but it cannot tell you whether the true chance is 50% or 70%. That is why we show trends as context, never as a prediction.