The power of analysis: statistical perspectives. Part 2.
A discussion of the importance of statistical power in research is presented accompanied by nomograms for determining sample size and statistical power for the Student's paired and unpaired t tests with a Type I error of 5%. A brief review of statistical inference is presented. Some findings from Part I are reviewed.
Bartko
J J
JJ
Division of Biometry and Applied Sciences, National Institute of Mental Health, Bethesda, MD 20817.
Pulver
A E
AE
Carpenter
W T
WT
D002986:Clinical Trials as Topic; D006801:Humans; D011336:Probability; D011594:Psychometrics; D011897:Random Allocation; D013223:Statistics as Topic