NORMDIST

NORMDIST(x, mean, standard_dev, cumulative)

Returns the probability distribution function OR the cumulative probability function for a normal distribution.

x	The number from the distribution.
mean	The arithmetic mean of the distribution.
standard_dev	The standard deviation of the distribution.
cumulative	A logical value indicating the type of function to use: False (or 0) = individual probability (equal to) True (<> 0) = cumulative probability (equal to or less than)

REMARKS

* NORM.DIST was added in Excel 2010 to replace this function.
* This function is only available for backwards compatibility and should not be used.
* The normal distribution is a continuous distribution
* If "x" is not numeric, then #VALUE! is returned.
* If "mean" is not numeric, then #VALUE! is returned.
* If "standard_dev" = 0, then #NUM! is returned.
* If "standard_dev" is not numeric, then #VALUE! is returned.
* If "cumulative" = False, then the height of the curve at "x" is returned.
* If "cumulative" = True, then the area under the curve to the left of "x" is returned.
* Example - If "mean" = 0 and "standard_dev" = 1 this function is equivalent to the standard normal distribution.
* You can use the NORM.INV function to return the inverse of the probability distribution function for normal distribution.
* You can use the NORM.S.DIST function to return the probability distribution function for a standard normal distribution.
* You can use the NORM.S.INV function to return the inverse of the probability distribution function for a standard normal distribution.
* For the Microsoft documentation refer to support.microsoft.com

	A
1	=NORMDIST(0, 0, 1, TRUE) = 0.5
2	=NORMDIST(-1, 0, 1, TRUE) = 0.159
3	=NORMDIST(1, 0, 1, TRUE) = 0.841
4	=NORMDIST(0, 0, 1, FALSE) = 0.399
5	=NORMDIST(1, 0, 1, FALSE) = 0.242
6	=NORMDIST(42, 40, 1.5, TRUE) = 0.909
7	=NORMDIST(42, 40, 10, TRUE) = 0.579
8	=NORMDIST(42, 40, 1.5, ) = 0.109
9	=NORMDIST("42", 40, 1.5, ) = 0.109
10	=NORMDIST(42, 40, , ) = #NUM!
11	=NORMDIST(42, "some text", 1.5, ) = #VALUE!