this post was submitted on 27 Jun 2023
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You need a much, much smaller sample size than you think. Estimates for Youtube's monthly unique visits range from ~2 billion to about ~2.7 billion. For a 5% margin of error at a 99.9% confidence level, you'd only need to sample 1083 people to get an accurate sample size.
I'm positive that extension has more than 1000 users.
Don’t you also need to worry about your sample population being biased? You’d only be sampling people who sought out a dislike plugin, these people might be much more likely to dislike a video. Is there any way to account for that?
You'd have to have a separate cohort of non-plugin users & another with a sampling of both, I think. Run some regressions on those data and I think you'd be able to tease out any bias that exists.