Applies ToSharePoint Server 訂閱版本 SharePoint Server 2019 SharePoint Server 2016 SharePoint Server 2013 SharePoint Server 2013 企業版 Microsoft 365 中的 SharePoint SharePoint Foundation 2010 SharePoint Server 2010 Microsoft 365 小型企業版中的 SharePoint Windows SharePoint Services 3.0

Returns the Weibull distribution. Use this distribution in reliability analysis, such as calculating a device's mean time to failure.

Syntax

WEIBULL(x,alpha,beta,cumulative)

X     is the value at which to evaluate the function.

Alpha     is a parameter to the distribution.

Beta     is a parameter to the distribution.

Cumulative     determines the form of the function.

Remarks

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

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

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

  • The equation for the Weibull cumulative distribution function is:

    Equation

  • The equation for the Weibull probability density function is:

    Equation

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

    Equation

Examples

X

Alpha

Beta

Formula

Description (Result)

105

20

100

=WEIBULL([X],[Alpha],[Beta],TRUE)

Weibull cumulative distribution function for the specified arguments (0.929581)

105

20

100

=WEIBULL([X],[Alpha],[Beta],FALSE)

Weibull probability density function for the specified arguments (0.035589)

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