Sample size determination and power analysis using the G*Power software

🤖 Plain-English Summary

Appropriate sample size calculation and power analysis have become major issues in research and publication processes. The G*Power software supports sample size and power calculation for various statistical methods (F, t, χ2, z, and exact tests).

🔑 Key Findings

• However, the complexity and difficulty of calculating sample size and power require broad statistical knowledge, there is a shortage of personnel with programming skills, and commercial programs are often too expensive to use in practice.
• The review article aimed to explain the basic concepts of sample size calculation and power analysis; the process of sample estimation; and how to calculate sample size using G*Power software (latest ver.
• 3.1.9.7; Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany) with 5 statistical examples.

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