Normal Distribution 

Function: calc[NormalProbPlot] - plots a Normal pdf 

Calling Sequence:  

NormalProbPlot mu, sigma, a, b
Parameters:  

mu - mean 

sigma -  standard deviation
a - number
b - number, left or right
p - returns the probability 

Description: 

  • NormalProbPlot plots the normal probability density function. The shaded area equals P(`<=`(X, a)) when b = left, P(`>=`(X, a)) when b = right, and P(`and`(`<=`(a, X), `<=`(X, b))) when The probability Pis calculated and displayed above the graph
 

Examples: 

> restart: with(calc):
 

> NormalProbPlot(-1,2,-3,1,p);
 

Plot_2d
 

> NormalProbPlot(0,1,1.96,left,p);
 

Plot_2d
 

> NormalProbPlot(1,1,2.5,right,p);
 

Plot_2d