||[Feb. 22nd, 2009|11:17 pm]
Doctoral Psych Students' Dissertation Community
Is there an average confidence interval one should use when calculating sample size in a quantitative dissertation? Or are there specific variables I should consider first when looking at the confidence interval?
I'm looking at doing a study with 5th, 6th, and 7th graders, and the total population I could potentially sample is approximately 2000 students.