NORMDIST

NORMDIST(x, mean, standard_dev, cumulative)

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

xThe number from the distribution.
meanThe arithmetic mean of the distribution.
standard_devThe standard deviation of the distribution.
cumulativeA logical value indicating the type of function to use:
False (or 0) = [[probability distribution function]] (equal to)
True (<> 0) = [[cumulative probability function]] (equal to or less than).

REMARKS
* NORM.DIST was added in Excel 2010 to replace this function.
* 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
* You can use the NORM.S.DIST function to
* You can use the NORM.S.INV funciton to
* For the Microsoft documentation refer to support.microsoft.com
* For the Google documentation refer to support.google.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!


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