> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Moshe Olshansky > Sent: Wednesday, November 18, 2009 3:21 PM > To: R-help@r-project.org > Subject: [R] Confidence intervals - a statistical question, nothing to do > with R > > Dear list, > > I have r towns, T1,...,Tr where town i has population Ni. For each town I > randomly > sampled Mi individuals and found that Ki of them have a certain property. So > Pi = > Ki/Mi is an unbiased estimate of the proportion of people in town i having > that > property and the weighted average of Pi is an unbiased estimate of the > proportion of > the entire population (all r towns) having this property. > I can compute confidence intervals for the proportion of people having that > property > for each city (in my case Mi << Ni and so binomial distribution is a good > approximation to Ki). > My question is: how can I compute confidence interval for the proportion of > people > in the entire population (r towns) having that property? Either analytical or > numerical > (simulation?) method will be all right. > > Thank you in advance, > > Moshe. >
You might want to look at the survey package for getting appropriate variance estimates. Hope this is helpful, Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
