Function that computes and draws the area between two user specified values in a user specified normal distribution with a given mean and standard deviation
normarea(lower =-Inf, upper =Inf, m, sig)
Arguments
lower: the lower value
upper: the upper value
m: the mean for the population
sig: the standard deviation of the population
Examples
normarea(70,130,100,15)# Finds and P(70 < X < 130) given X is N(100,15).