WorksheetFunction.Beta_Inv(Double, Double, Double, Object, Object) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Returns the inverse of the cumulative distribution function for a specified beta distribution. That is, if probability = Beta_Dist(x,...), then Beta_Inv(probability,...) = x.
public double Beta_Inv (double Arg1, double Arg2, double Arg3, object Arg4, object Arg5);Public Function Beta_Inv (Arg1 As Double, Arg2 As Double, Arg3 As Double, Optional Arg4 As Object, Optional Arg5 As Object) As DoubleParameters
- Arg1
- Double
A probability associated with the beta distribution.
- Arg2
- Double
The Alpha parameter of the distribution.
- Arg3
- Double
The Beta parameter the distribution.
- Arg4
- Object
An optional lower bound to the interval of x.
- Arg5
- Object
An optional upper bound to the interval of x.
Returns
Remarks
The beta distribution can be used in project planning to model probable completion times given an expected completion time and variability:
- If any argument is nonnumeric, Beta_Inv generates an error value.
- If alpha ≤ 0 or beta ≤ 0, Beta_Inv generates an error value.
- If probability ≤ 0 or probability > 1, Beta_Inv generates an error value.
- If you omit values for A and B (lower and upper bound), Beta_Inv uses the standard cumulative beta distribution, so that A = 0 and B = 1.
Given a value for probability, Beta_Inv seeks that value x such that Beta_Dist(x, alpha, beta, TRUE, A, B) = probability. Thus, precision of Beta_Inv depends on precision of Beta_Dist(Double, Double, Double, Boolean, Object, Object). Beta_Inv uses an iterative search technique.