Given a population of 125000 the ideal sample size for 95% confidence with a 5% error is [...] 383, so their sample is not really adequate.
Thanks phish! I'm happy that I didn't have to touch my statistics-books since about 1990. It's good though, that my feeling about the inappropriate numbers was right.
Oral use of Swedish moist snuff (snus) and risk for cancer of the mouth, lung, and pancreas in male construction workers: a retrospective cohort study...
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