When using normal approximation for binomial distribution (z-scores, standard deviation, mean ect...) can you ever put the mean before the other number
so (MEAN-X)/standard deviation?????????
This will change the sign of the z-score, so depending on the table you areOriginally Posted by Arbitur
using it will possibly allow you to look up a probability for a non-tabulated z-score, or will give the other tail probability, or ..
But there realy is no point (as far as I can see).