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> So, doesn't that just mean that a statistically significant portion of the regular HN users would have to respond? No. If 50% of HN visitors voted but 99% of
by jbert 18y ago
> So, doesn't that just mean that a statistically significant portion of the regular HN users would have to respond?
No. If 50% of HN visitors voted but 99% of those over 40 didn't (due to whatever confounding factor you like - say embarrasment), you'd still wouldn't be able to extrapolate from the sample to the category of "HN visitors".
- tokenadult 18y agoCorrect. It doesn't matter how large a sample size is if the sample is biased. This should be something that every high school student knows after any high school statistics course, but it is a crucial consideration that is widely ignored.
- whatusername 18y agoalthough we can all think of an edge case.. (especially if we know how the sample is biased) eg: a gender survey in the general population that transgender respondees do not answer -- ends up with a 99% sample size (all but the transgenders) -- and thus gives a pretty significant bit of data on male:female ratios, etc.. Agreed in principle though.