Understanding Power and Rules of Thumb for Determining Sample Sizes

@inproceedings{VanvoorhisUnderstandingPA,
  title={Understanding Power and Rules of Thumb for Determining Sample Sizes},
  author={Carmen R Wilson Vanvoorhis and Betsy L. Morgan}
}
This article addresses the definition of power and its relationship to Type I and Type II errors. We discuss the relationship of sample size and power. Finally, we offer statistical rules of thumb guiding the selection of sample sizes large enough for sufficient power to detecting differences, associations, chi‐square, and factor analyses. As researchers, it is disheartening to pour time and intellectual energy into a research project, analyze the data, and find that the elusive .05… CONTINUE READING

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