Depends on your dataset, confidence, and margin of error.
Assuming that 95% of billionaires will act similarly and 750-ish total billionaires in the US, if you want to have 99% confidence and 1% margin of error, you’ll need a minimum sample size of around 600.
correlation is not causation.
repeat the experiment.
Without 25 observations at least we cannot draw conclusions
Depends on your dataset, confidence, and margin of error.
Assuming that 95% of billionaires will act similarly and 750-ish total billionaires in the US, if you want to have 99% confidence and 1% margin of error, you’ll need a minimum sample size of around 600.
We really should be thorough. For science.
Usually I would nit pick the hypothesis you want to confirm and the math you used, but for some reason 600 sounds right.
Hmmmm… I wonder what would cause pharmaceutical prices mysteriously drop?