WorksheetFunction.NormDist(Double, Double, Double, Boolean) Method
Definition
Important
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Returns the normal distribution for the specified mean and standard deviation. This function has a very wide range of applications in statistics, including hypothesis testing.
public:
double NormDist(double Arg1, double Arg2, double Arg3, bool Arg4);public double NormDist (double Arg1, double Arg2, double Arg3, bool Arg4);Public Function NormDist (Arg1 As Double, Arg2 As Double, Arg3 As Double, Arg4 As Boolean) As DoubleParameters
- Arg1
- Double
X - the value for which you want the distribution.
- Arg2
- Double
Mean - the arithmetic mean of the distribution.
- Arg3
- Double
Standard_dev - the standard deviation of the distribution.
- Arg4
- Boolean
Cumulative - a logical value that determines the form of the function. If cumulative is true, NormDist returns the cumulative distribution function; if false, it returns the probability mass function.
Returns
Remarks
Important: This function has been replaced with one or more new functions that may provide improved accuracy and whose names better reflect their usage. This function is still available for compatibility with earlier versions of Excel. However, if backward compatibility is not required, you should consider using the new functions from now on, because they more accurately describe their functionality. For more information about the new function, see the Norm_Dist(Double, Double, Double, Boolean) method.
If mean or standard_dev is nonnumeric, NormDist returns the #VALUE! error value.
If standard_dev ≤ 0, NormDist returns the #NUM! error value.
If mean = 0, standard_dev = 1, and cumulative = true, NormDist returns the standard normal distribution, NormDist.
The equation for the normal density function (cumulative = false) is:
Figure 1: Equation for the normal density function
When cumulative = true, the formula is the integral from negative infinity to x of the given formula.