Statistical inference is based on random sampling. The data has to be random, otherwise it doesn't work. I wrote another comment here clarifying my point, if y

Statistical inference is based on random sampling. The data has to be random, otherwise it doesn't work. I wrote another comment here clarifying my point, if you're interested: https://news.ycombinator.com/item?id=47566033 https://news.ycombinator.com/item?id=47566033