FITS OF HCV LOAD DATA BY IRWLS FOR DIFFERENT THETA VALUES 
 
Fit of model with power 0 
 
Estimate of beta 1.421831 1.284388 -0.1850593 
Number of iterations 6 
Estimate of sigma squared 29797148898 
Estimate of sigma 172618.5 
 
 
Fit of model with power 0.5 
 
Estimate of beta 1.419543 1.264312 -0.182312 
Number of iterations 7 
Estimate of sigma squared 15913.24 
Estimate of sigma 126.1477 
 
 
Fit of model with power 1 
 
Estimate of beta 1.425401 1.280732 -0.1823875 
Number of iterations 9 
Estimate of sigma squared 0.01070570 
Estimate of sigma 0.1034684