The normaldist function describes the probability distribution of a continuous random variable that follows a normal distribution, it is often used in the natural and social science to represent real-valued random variables whose distribution are not known. The normaldist function has 3 arguments: Real parameter x, Real value mi( mean or expectation of the distribution of x) and Real positive value ro( standard deviation of x). We can see the plot of the normaldist function below in a MD Document.
