Displaying 2 results from an estimated 2 matches for "riveira".
2006 Aug 21
1
Fwd: Re: Finney's fiducial confidence intervals of LD50
..." of Finney's fiducial confidence intervals but only if there was a better method..
any idea?
Renaud Lancelot <renaud.lancelot@gmail.com> wrote:
Date: Mon, 21 Aug 2006 16:35:49 +0200
From: "Renaud Lancelot" <renaud.lancelot@gmail.com>
To: "carlos riveira" <carlos.riveira@yahoo.com>
Subject: Re: [R] Finney's fiducial confidence intervals of LD50
CC: r-help@stat.math.ethz.ch
Sorry there was a typo in my previous reply:
> D50 <- 10^c(logD50 + c(0, -1.96, 1.96) * attr(logD50, "SE"))
> names(D50) <- c("D50&quo...
2006 Aug 21
2
Finney's fiducial confidence intervals of LD50
I am working with Probit regression (I cannot switch to logit) can anybody help me in finding out how to obtain with R Finney's fiducial confidence intervals for the levels of the predictor (Dose) needed to produce a proportion of 50% of responses(LD50, ED50 etc.)?
If the Pearson chi-square goodness-of-fit test is significant (by default), a heterogeneity factor should be used to calculate