power of the study

What Factors Affect the Power of a Study?


Several factors can influence the power of a study:
Sample Size: Larger sample sizes generally increase the power of a study.
Effect Size: Larger effect sizes are easier to detect, thereby increasing power.
Significance Level: Lowering the alpha level (e.g., from 0.05 to 0.01) decreases the power because it makes it harder to achieve statistical significance.
Variability: Higher variability in the data can reduce power, as it makes differences harder to detect.

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