EasyFit – Easily Fit Distributions to Your Data!

# Phased Bi-Weibull Distribution

## Parameters

- continuous shape parameter ()
- continuous scale parameter ()
- continuous location parameter

- continuous shape parameter ()
- continuous scale parameter ()
- continuous location parameter ()

The parameters are constrained by the following relation

When you manually specify the parameter values, EasyFit automatically computes the parameter based on this equation, so you don't need to calculate it by hand.

## Worksheet and VBA Functions

The following worksheet and VBA functions are available for this distribution:

 Description VBA Functions Worksheet Functions Distribution Fitting - ``` =DistFit("PhasedBiWeib";Data;[Options]```1```) ``` Probability Density Function `PhasedBiWeibPdf(x,alpha1,beta1,gamma1,alpha2,beta2,gamma2)` ``` =PhasedBiWeibPdf(alpha1;beta1;gamma1;alpha2;beta2;gamma2) =DistPdf("PhasedBiWeib(alpha1;beta1;gamma1;alpha2;beta2;gamma2)";x) ``` Cumulative Distribution Function `PhasedBiWeibCdf(x,alpha1,beta1,gamma1,alpha2,beta2,gamma2)` ``` =PhasedBiWeibCdf(alpha1;beta1;gamma1;alpha2;beta2;gamma2) =DistCdf("PhasedBiWeib(alpha1;beta1;gamma1;alpha2;beta2;gamma2)";x) ``` Survival Function `PhasedBiWeibSurv(x,alpha1,beta1,gamma1,alpha2,beta2,gamma2)` ``` =DistSurv("PhasedBiWeib(alpha1;beta1;gamma1;alpha2;beta2;gamma2)";x) ``` Hazard Function `PhasedBiWeibHaz(x,alpha1,beta1,gamma1,alpha2,beta2,gamma2)` ``` =PhasedBiWeibHaz(alpha1;beta1;gamma1;alpha2;beta2;gamma2) =DistHaz("PhasedBiWeib(alpha1;beta1;gamma1;alpha2;beta2;gamma2)";x) ``` Cumulative Hazard Function `PhasedBiWeibCumHaz(x,alpha1,beta1,gamma1,alpha2,beta2,gamma2)` ``` =DistCumHaz("PhasedBiWeib(alpha1;beta1;gamma1;alpha2;beta2;gamma2)";x) ``` Inverse CDF (Quantile Function) `PhasedBiWeibInv(P,alpha1,beta1,gamma1,alpha2,beta2,gamma2)` ``` =PhasedBiWeibInv(alpha1;beta1;gamma1;alpha2;beta2;gamma2) =DistInv("PhasedBiWeib(alpha1;beta1;gamma1;alpha2;beta2;gamma2)";P) ``` Random Numbers `PhasedBiWeibRand(alpha1,beta1,gamma1,alpha2,beta2,gamma2)` ``` =PhasedBiWeibRand(alpha1;beta1;gamma1;alpha2;beta2;gamma2) =DistRand("PhasedBiWeib(alpha1;beta1;gamma1;alpha2;beta2;gamma2)") ```

1. The `Options` parameter is optional. Possible options: "gamma1=value"  (example: "gamma1=0")