I saw this question in the close vote queue. I agree it's seems very vague and hard to answer, but apparently the users who know more about statistics disagree since the person who commented on the question seems to understand it, and there's a very complete looking answer, so I went to hit "Keep Open".
But then I noticed the question is from 2016. Why is it resurfacing now, and why close a 4 year old question that already has a (unaccepted) answer? Is it site policy to close abandoned questions if they don't have an accepted answer? If so, why is there not simply an "abandoned" close-vote reason? I mean, what would you do with an abandoned question which is well-written and can't be justified as closable on the usual grounds of lacking context, being off-topic, etc?