**Introduction**

**Introduction**

**Fisher's Exact Test**

**Chi-Squared Test**

**McNemar's Test**

**Independent t-Test**

**Paired t-Test**

**Wilcoxon Rank-Sum Test**

**Wilcoxon Signed-Rank Test**

**A Guide to Power Analysis**

for Hypothesis Tests with One Categorical Independent Variable with Two Groups

for Hypothesis Tests with One Categorical Independent Variable with Two Groups

*University of Bonn*

*University of Bonn*

*University of Bonn, Fraunhofer FKIE*

- Thom Baguley. Standardized or simple effect size: What should be reported?
*British Journal of Psychology*, 100(3):603–617, 2009. - Jacob Cohen.
*Statistical Power Analysis for the Behavioral Sciences*. L. Erlbaum Associates, Hillsdale, N.J, 2nd ed edition, 1988. - Julian di Stephano. How much power is enough? Against the development of an arbitrary convention for statistical power calculations.
*Functional Ecology*, 17(5):707–709, 2003. - Paul D. Ellis.
*The Essential Guide to Effect Sizes. Statistical Power, Meta-Analysis, and the Interpretation of Research Results*. Cambridge University Press, 2010. - Franz Faul, Edgar Erdfelder, Albert-Georg Lang, and Axel Buchner. G*Power 3: A flexible statistical power analysis program for the social, behavioral, and biomedical sciences.
*Behavior Research Methods*, 39(2):175–191, May 2007. - Robert Rosenthal. Parametric Measures of Effect Size. In Harris Cooper and Larry Hedges, editors,
*The Handbook of Research Synthesis*, pages 231–244. Russel Sage Foundation, New York, 1994.