Here was a "self-proclaimed" penalty kicker. To test whether his skills were genuine, he was asked to kick a penalty kick and succeeded five times in a row. So, can we say that the PKer's skills are genuine?
To this question, some will answer, "You put it in five times in a row, so it must be real", while others will say, "No, no, you can't tell with just five times, you might get it wrong on the sixth time." It's a matter of opinion, isn't it?
This is objectively determined using statistics, a method called hypothesis testing. First, the hypothesis (named H0)
