Welcome to Research 13.com

For those who write market research RFPs.  Here is a site that can help you determine how big a sample size you need for the size of audience you are interested in studying.  This way your vendors will be giving prices based upon the correct sample size and the proposals you receive will be directly comparable. Or you can call us with any questions (503) 863-9913:

http://www.macorr.com/ss_calculator.htm