x,alpha,beta,cumulative!Returns the Weibull distribution!is the value at which to evaluate the function, a nonnegative number!is ...

!x,alpha,beta,cumulative!!Returns the Weibull distribution!is the value at which to evaluate the function, a nonnegative number!is a parameter to the distribution, a positive number!is a parameter to the distribution, a positive number!is a logical value: for the cumulative distribution function, use TRUE; for the probability mass function, use FALSE!