Hi,
I wanted to know what the following columns mean in the "infert" dataset: parity count matched set number 1-83 stratum number 1-63 Thank you, Fayez Urbana, IL, USA [[alternative HTML version deleted]] ______________________________________________ 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.