An addendum: There’s also the “Ecological fallacy” to consider—where a dataset suggests that on the mean, a population A has property P and population B has P+5, but randomly selecting members of each population will give very different results due to differences in distribution.
An addendum: There’s also the “Ecological fallacy” to consider—where a dataset suggests that on the mean, a population A has property P and population B has P+5, but randomly selecting members of each population will give very different results due to differences in distribution.