There’s one important caveat to keep in mind whenever you’re doing statistical tests: you need to check whether your observed findings happened because of something meaningful or were just due to chance. For instance, if you flip a coin six times and get five heads, you can’t be confident that the coin is unfairly weighted toward heads — it could just be dumb luck. But if you flipped the coin six hundred times and got five hundred heads, you might be on to something.
