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Example of Sample Size Requirements for High Statistical Power
To achieve high statistical power in psychological research, sample sizes must be larger than often realized. For an independent-samples -test with a large population effect, it requires approximately participants per sample to reach a power of , while reaching a power of requires participants per sample.
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Research Methods in Psychology - 4th American Edition @ KPU
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Example of Sample Size Requirements for High Statistical Power
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Which of the following best defines the statistical power of a research design?
A researcher designs a study with a statistical power of .80. This means there is a 20% probability that the study will fail to detect a real effect that actually exists in the population.