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Factors that Affect Statistical Power

Factors that Affect Statistical Power Number of tails in the statistical test One tailed tests have greater power than two tailed tests of significance Probability of making a Type I error (significance)

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Factors that Affect Statistical Power

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  1. Factors that Affect Statistical Power • Number of tails in the statistical testOne tailed tests have greater power than two tailed tests of significance • Probability of making a Type I error (significance) • The greater the probability of making a Type I error, the greater the power of the statistical test • Sample size The greater the sample size, the greater the power of the statistical test • Effect Size • The greater the effect size, the greater the power of the statistical test

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