WEIBULL.DIST function

Syntax

WEIBULL.DIST(x,alpha,beta,cumulative)

The WEIBULL.DIST function syntax has the following arguments:

• X     Required. The value at which to evaluate the function.

• Alpha     Required. A parameter to the distribution.

• Beta     Required. A parameter to the distribution.

• Cumulative     Required. Determines the form of the function.

Remarks

• If x, alpha, or beta is nonnumeric, WEIBULL.DIST returns the #VALUE! error value.

• If x < 0, WEIBULL.DIST returns the #NUM! error value.

• If alpha ≤ 0 or if beta ≤ 0, WEIBULL.DIST returns the #NUM! error value.

• The equation for the Weibull cumulative distribution function is:

  

• The equation for the Weibull probability density function is:

  

• When alpha = 1, WEIBULL.DIST returns the exponential distribution with:

  

Example

Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.