M meljr New member Jun 21, 2010 #2 You have to have a sample of about 30 cases for any study or your results be be week. There will be very little difference between the results of 1000 cases or say 10,000 cases.
You have to have a sample of about 30 cases for any study or your results be be week. There will be very little difference between the results of 1000 cases or say 10,000 cases.