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Formulas: Cumulative Distribution Function (CDF) for the Standard Normal Distribution
                                    
                                 
                             
                         
                        
                        
                        
                        
                     
                    
                    
                    
                        
                            
                                
                                
                                
                                
                                
                                    
                                    
                                        
                                        
                                        
                                        
                                    
                                    
                                    
    Cumulative Distribution Function (CDF) for the Standard Normal Distribution Formulas
    Below you will find descriptions and details for the 2 formulas that are used to compute cumulative distribution function (CDF) values for the standard normal distribution.
    
    
Standard normal distribution cumulative distribution function (CDF):
 
where 
erf is the error function.