Friday, December 15, 2017
Thursday, December 14, 2017
Wednesday, December 13, 2017
Andrew Gelman — Yes, you can do statistical inference from nonrandom samples. Which is a good thing, considering that nonrandom samples are pretty much all we’ve got.
To put it another way: Sure, it’s fine to say that you “cannot reach external validity” from your sample alone. But in the meantime you sti...
Tuesday, December 12, 2017