On May 19, 2012, at 7:46 AM, Ross, Stephanie wrote:
Hi All,
I have a question regarding contingency tables. I would like to
calculate the mean and standard deviation of a continuous variable
from my own dataset based on the percentages of a contingency table
I obtained from a scientific article.
dataset<- data.frame(cbind(case=rep(0:1,5), x1=c(1:10), x2=c(0:9)))
contingency_table<- matrix(c(100, 75, 65, 85, 90, 87), nrow=3, ncol=3)
In other words I would like to calculate the mean and standard
deviation of "X1" based on the frequencies of the contingency table.
You may need to expand upon the connections you see between 'dataset'
and 'contingency_table'. (I see none.) The request to "calculate the
mean and standard deviation of a continuous variable from my own
dataset based on the percentages of a contingency table" likewise
makes no sense to me.
Perhaps you could refer to an actual article with a hypertext link?
and say what estimate you want from which table?
(Some of us are impossibly concrete in our thinking.)
--
David.
Thank you so much for all your help!
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