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 Microsoft Excel > Functions > Statistical > WEIBULL
 

WEIBULL(x, alpha, beta, cumulative)

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

 xThe value at which to evaluate the function.
 alphaThe first parameter.
 betaThe second parameter.
 cumulativeThe form of the function ??

 REMARKS
 
  		• If "x", "alpha", or "beta" is nonnumeric, then #VALUE! is returned.
     
  		• If "x" < 0, then #NUM! is returned.
     
  		• If "alpha" = 0, then #NUM! is returned.
     
  		• If "beta" = 0, then #NUM! is returned.

     EXAMPLES
     
     A
    1=WEIBULL(105,20,100,TRUE) = 0.930
    2=WEIBULL(105,20,100,FALSE) = 0.036
    3=WEIBULL(5,1,2,3) = 0.918
    		 
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