EXCEL WEIBULL FUNCTION

The Excel WEIBULL function computes the Weibull Probability Density Function or the Weibull Cumulative Distribution Function for a given criterion.

Syntax :

=WEIBULL( x, alpha, beta, cumulative)

Parameters :

  • x – The value at which the function is to be computed (must be 0).
  • alpha – The distribution’s shape parameter (must be greater than 0).
  • beta – The distribution’s Scale parameter (must be greater than 0).
  • cumulative – A logical argument that defines the type of distribution to be employed;

TRUE=Weibull Cumulative Distribution Function
FALSE=Weibull Probability Density Function

Step By Step Guide of WEIBULL Function

Example :

The graphic in below side shows the Weibull Probability Density Function with the shape parameter, alpha, set to 3 and the scale parameter, beta, set to 1.

If you wish to determine the value of this function at x = 1, you may use the Excel Weibull function.

=WEIBULL( 1, 3, 1, FALSE )

This yields the answer 1.10363832351433.

Weibull Function
  • #NUM! – Occurs if either the supplied x value is zero or the supplied alpha or beta parameter is zero.
  • #VALUE! – This error occurs if any of the supplied parameters is not a number.

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