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...l not only is correct, statistically, but also give results that are substantively different than the 'usual' models. I hope that this will increase the use of appropriate models in the field (which, in case anyone is interested, is substance abuse research, and, in my particular case, the syringe-sharing behaviors of drug injectors). Peter Peter L. Flom, PhD Assistant Director, Statistics and Data Analysis Core Center for Drug Use and HIV Research National Development and Research Institutes 71 W. 23rd St www.peterflom.com New York, NY 10010 (212) 845-4485 (voice) (917) 438-0894 (fax)

...oofing, Ceilings and Fa?ades, Plated Drums, Aluminum Buckets, Injected Polypropylene Housewares, Pressed Melamine Items (Glasses, Cups, Plates, Mugs, etc.), Mufflers, Construction Electrically Welded Mesh, Plastic Bags and Packaging, Mobile units of medical assistance, Sanitary Material, Hypodermic Syringes, Hemostatic Clamps, etc. Science Network has started a process of Co-investment for the installation of small Assembly plants to manufacture in series the Mini-plants of portable production on the site, region or country where they may be required. One of the most relevant features is the fact th...

Dear everyone I am a bit of a computer imbecile and are having problems with R. I am using R in my research project to do chi-square tests on data imported from excel . However I have som missing data in one of my variables (columns) and I need R to "exclude" these and make chi-square test on the data that I have. I use a formula to make 2x2 tables which is: data <-