### WEIBULL(x, alpha, beta, cumulative)

Returns the probability of getting less than or equal to a particular value in a weibull distribution.

 x The numeric value at which to evaluate the function. alpha The first parameter. beta The second parameter. cumulative The type of function to useTrue = cumulative probability functionFalse = probability mass function

#### Remarks

 * WEIBULL.DIST was added in Excel 2010 to replace this function.* The Weibull distribution is a continuous distribution.* If "x", is nonnumeric, then #VALUE! is returned.* If "x" < 0, then #NUM! is returned.* If "x" = 0, then ??* If "alpha" = 0, then #NUM! is returned.* If "alpha" is nonnumeric, then #VALUE! is returned.* If "beta" = 0, then #NUM! is returned.* If "beta" is nonnumeric, then #VALUE! is returned.* This function can be used in reliability analysis, such as calculating a device's mean time to failure.* For the Microsoft documentation refer to support.office.com

 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