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Readers' Choice Awards (siteadm) Fri, 13 Jun
Wow!!! 300 hundred people!! (dhmjr) Sat, 14 Jun

Statistical Validity

Posted by: sdugan
Date posted: Sun, 15 Jun 1997

A sample of 300 readers, from a population of 310,000 (InfoWorld subscribers) with 95% percent confidence yields an error of 5.7% in a worst case scenario (a score of 50%).

On a best case scenario, say a score of 95%, we get a margin of error of 2.5%.

Typically speaking, a confidence of 80% is considered acceptable, rather than the higher 95% I posit.

Also bear in mind, we're looking for a sample to reflect the population of InfoWorld subscribers, not the entire world.

Sean Dugan
Research Editor


So explain why (khasim) Sun, 15 Jun
Nope (CRConrad) Sun, 15 Jun
Another Inconsistency (Ron Findling) Mon, 16 Jun

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