That was the question that Dr. Chuck Chaprakani addressed in this interesting article.
It reminds me of Jacob Cohen’s Things I have learned (So Far) article.
Yes, beware of the so-called sample-size-of-30 “magic” number.
Hey SEOs. Read This: Is a Sample Size of 30 all You Need?
21 Friday Sep 2012
Posted in SEO Myths, Statistics and Mathematics
