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2006 Aug 21
2
Finney's fiducial confidence intervals of LD50
...lt;-rep(30.5,12)
Dose<-rep(c(10,40,160,640),3)
probit<-glm(formula = Response/Tot~ log10(Dose), family=quasibinomial
(link=probit))
D50<- round(10^(dose.p(probit,cf=1:2,p=0.5)))
#This is what SPSS calculates. I would like to reproduce these results with R:
#SPSS RESULTS:
#PRNT50= 140,83525
#CI = 98,37857;205,34483
#Regr.coeff= 1,91676 (S.E.=0,16765)
#Intercept=-4,11856 (S.E.=0,36355)
Thanks a lot for your help.
Carlos
__________________________________________________
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2006 Aug 21
1
Fwd: Re: Finney's fiducial confidence intervals of LD50
...t; > probit<-glm(formula = Response/Tot~ log10(Dose), family=quasibinomial
> > (link=probit))
> > D50<- round(10^(dose.p(probit,cf=1:2,p=0.5)))
> >
> > #This is what SPSS calculates. I would like to reproduce these results with R:
> > #SPSS RESULTS:
> > #PRNT50= 140,83525
> > #CI = 98,37857;205,34483
> > #Regr.coeff= 1,91676 (S.E.=0,16765)
> > #Intercept=-4,11856 (S.E.=0,36355)
> > Thanks a lot for your help.
> >
> > Carlos
> >
> > __________________________________________________
> >
> >
> &...