:I would welcome a larger study. But even observations on small sample sizes can be statistically significant. The rate of lung cancer among non-smokers is very low, and thus it does not require a large sample size of smokers who developed lung cancer in order to draw conclusions of correlation and causation.--[[User:Aschlafly|Andy Schlafly]] 10:39, 22 February 2010 (EST) | :I would welcome a larger study. But even observations on small sample sizes can be statistically significant. The rate of lung cancer among non-smokers is very low, and thus it does not require a large sample size of smokers who developed lung cancer in order to draw conclusions of correlation and causation.--[[User:Aschlafly|Andy Schlafly]] 10:39, 22 February 2010 (EST) |