A Researcher Plans to Conduct a Study to Compare Two

Multiple Choice

A researcher plans to conduct a study to compare two groups.Based on previous research,she anticipates a medium effect size.She does a power analysis with alpha level of .05.This power analysis tells her

A) the t-test outcome and degrees of freedom she should expect.
B) the sample size she will need to observe a statistically significant finding.
C) Cohen's d for her study.
D) the practical significance of her research.