


The Javascript Program Calculates the Probability for a Cumulative Normal Distribution:This program calculates the probability for a cumulative normal distribution function for a given xvalue, mean, and standard deviation. The top three yellow cells must have values in it, while the result is displayed in the green cell. 
Fill in the fields Using the ProgramThe user can define how many points to use in estimating the integral of the normal probability distribution. The default value is 50, which is a good trade off between speed and accuracy. The following arithmetic operations can be inserted into any of the cells
The program calculates the probability of x for a given mean and standard deviation. The probability is shown as the red region in the graph: The calculation is: 
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