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.

Thank you so much for all your help!

________________________________
PHRI DISCLAIMER
This information is directed in confidence solely to the person named above and may not otherwise be distributed, copied or disclosed. Therefore, this information should be considered strictly confidential. If you have received this email in error, please notify the sender immediately via a return email for further direction. Thank you for your assistance.

	[[alternative HTML version deleted]]

