Power & Effect Size
"In plain English, statistical power is the likelihood that a study will detect an effect when there is an effect there to be detected." (linked on 6/27/2018)
"The simple definition of effect size is the magnitude, or size, of an effect." (linked on 6/27/2018)
This is a good place to start for a brief overview and guide to conducting a power analysis:
See A Resea...