### Notes

The return value is a z-score, which represents how far the value is from the mean of the distribution in terms of the standard deviation. See NORM.INV for non-standardized input. Probability input outside of the range of (0,1) results in an error. The standard normal distribution is a special case of the normal distribution with a mean of 0 and a standard deviation of 1. The standard normal cumulative distribution function returns the probability of an event occurring below a threshold value. This probability is equal to the area under the bell-shaped curve to the left of the threshold value.

### Dave Bruns

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