is the function normpdf on graphing calculators ever used?
Yes it is but I am not sure how. What exact question would it be used for?
I'd like to know too :/
normpdf calculates the probability density function values for a normal distribution of given mean and standard deviation.
For example, if we have a normal distribution with mean 10 and standard deviation 3 and we want to know the value of the probability density at 12, then normpdf(12,10,3) = 0.106483 (at least, that's how it's done on the TI-Nspire calculator).