This program calculates the probability for a cumulative normal distribution function for a given x-value, mean, and standard deviation. The top three yellow cells must have values in it, while the result is displayed in the green cell.
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Using the Program
The 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: