search for: kalythos

hi, people How can we compare two probit models brought out from the same data? Let me use the example used in "An Introduction to R". "Consider a small, artificial example, from Silvey (1970). On the Aegean island of Kalythos the male inhabitants suffer from a congenital eye disease, the effects of which become more marked with increasing age. Samples of islander males of various ages were tested for blindness and the results recorded. The data is shown below: Age: 20 35 45 55 70 No. tested: 50 50 50 50 50 No. blind: 6...

Respected Sir/Madam, I have a question regarding calculation of LD50 (Lethal Dose) and IC50 (50% inhibitory concentration) of an antimicrobial experiment. I have used a compound isolated from a plant and observed its effect on the fungus *Fusarium oxysporum* by the food poisoning method. Solutions of the compound at concentrations of 0, 50, 100, 150, 200 and 250µg/ ml were added to

...======================================= [-default-] {+default,+} ====================================================================== --- R-intro.texi~ Mon Aug 23 13:23:57 2004 +++ R-intro.texi Mon Aug 23 13:23:57 2004 @@ -4864,7 +4864,7 @@ > fml <- glm(Ymat ~ x, family = binomial, data = kalythos) @end example -Since the logit link is the default the parameter may be omitted on the +Since the logit link is the default, the parameter may be omitted on the second call. To see the results of each fit we could use @example ===============================================================...