Yeah there's a lot not great in this. Mean instead of median is a big one. I'd object more to the basic lack of explanation in many parts though, including why

Yeah there's a lot not great in this. Mean instead of median is a big one. I'd object more to the basic lack of explanation in many parts though, including why you'd pick the mean (during which they could well have talked themselves into fixing that error), why randomized is a decent strategy, what you're trying to avoid in a pivot, etc.