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# WorksheetFunction.Beta_Dist Method (Excel)

Office 2010

Returns the beta cumulative distribution function.

expression .Beta_Dist(Arg1, Arg2, Arg3, Arg4, Arg5)

expression A variable that represents a WorksheetFunction object.

### Parameters

Name

Required/Optional

Data Type

Description

Arg1

Required

Double

The value between A and B at which to evaluate the function.

Arg2

Required

Double

The Alpha parameter of the distribution.

Arg3

Required

Double

The Beta parameter of the distribution.

Arg4

Optional

Variant

Cumulative - a logical value that determines the form of the function. If cumulative is TRUE, BETA.DIST returns the cumulative distribution function; if FALSE, it returns the probability density function.

Arg5

Optional

Variant

An optional lower bound to the interval of x.

Arg6

Optional

Variant

An optional upper bound to the interval of x.

### Return Value

Double

The beta distribution is commonly used to study variation in the percentage of something across samples, such as the fraction of the day people spend watching television:

• If any argument is nonnumeric, Beta_Dist returns the #VALUE! error value.

• If alpha ≤ 0 or beta ≤ 0, Beta_Dist generates an error value.

• If x < A, x > B, or A = B, Beta_Dist generates an error value.

• If you omit values for A and B (lower and upper bound), Beta_Dist uses the standard cumulative beta distribution, so that A = 0 and B = 1.