Posts: 8533
Posted: Thu Mar 31, 2011 11:46 am
"Raw data is always good to have."
No, it's not always good to have. Raw data is good to have if you know what its strenghts and weaknesses are and are sufficiently experienced to know how to use it properly.
And a sample size of 30, the largest listed, would carry a margin of error of 18%, and that's only IF those 30 people actually represent a random sample, which is doubtful.