Displaying 2 results from an estimated 2 matches for "fungicide".
2010 Apr 25
1
Struggling with two questions : Newbie student .
...to a medical center for further testing . if 45% of
the employees have positive indications of asbestos in their lungs , find
the probability that twelve employees must be tested in order to find the
four positives to send for further testing ?
2. In a small scale trial five seeds are treated with fungicide and five
seeds are untreated with fungicide. Seeds were then planted and the number
was counted . If four plants actually sprouted what is the probability that
a) all four plants emerged form the treated seeds.
b)Three of few emerged from the treated seeds
Regards
Malcolm
[[alternative HTML ve...
2010 Dec 16
1
defining a formula method for a weighted lm()
...9;d like to define methods for fitting
weighted lm()s to the resulting loddsratio objects,
but I'm having problems figuring out how to do this generally.
# install.packages("vcdExtra", repos="http://R-Forge.R-Project.org")
library(vcdExtra)
> fung.lor <- loddsratio(Fungicide)
> fung.lor
log odds ratios for group and outcome by sex, strain
strain
sex 1 2
M -1.596015 -0.8266786
F -1.386294 -0.6317782
>
> fung.lor.df <- as.data.frame(fung.lor)
> fung.lor.df
group outcome sex strain LOR ASE
1 Control:Treated Tumor:NoTumor M 1 -1.5960149 0.7394909
2 Cont...