3 ms·
I'd prefer to just treat scores as continuous and correct using `t_ppf(.975, n-1)` instead of the normal approximation (1.96) but I suppose working from a multi
by stdbrouw 11y ago
I'd prefer to just treat scores as continuous and correct using `t_ppf(.975, n-1)` instead of the normal approximation (1.96) but I suppose working from a multinomial distribution would give pretty similar results.
- vcdimension 11y agoYou're still relying on the central limit theorem (i.e. a reasonable amount of data) : using t instead of z just corrects for the fact that you only have sample variances instead of population variances. However, I suppose it's not unreasonable to assume that the ratings are likely to have a bell shaped distribution (which could be checked), so the normal/t approximation is probably going to be OK.
- stdbrouw 11y agoAh yes, true. Let's call it a bias/variance tradeoff ;-)