import mir.test: shouldApprox;

0.0.weibullCCDF(3.0).shouldApprox == 1;
0.5.weibullCCDF(3.0).shouldApprox == 0.8824969;
1.0.weibullCCDF(3.0).shouldApprox == 0.3678794;
1.5.weibullCCDF(3.0).shouldApprox == 0.03421812;

// Can also provide scale parameter
0.5.weibullCCDF(2.0, 3.0).shouldApprox == 0.9726045;
1.0.weibullCCDF(2.0, 3.0).shouldApprox == 0.8948393;
1.5.weibullCCDF(2.0, 3.0).shouldApprox == 0.7788008;