Question: A researcher is interested in determining the required sample size for a two-tailed independent samples t test using two groups of equal size with the

A researcher is interested in determining the required sample size for a two-tailed independent samples t test using two groups of equal size with the following parameters: Level of significance = 0.05 Cohen's d (effect size) = 0.5 Power = 90% The required total sample size for this test is _____.

Answer choices: 172 140 86 44

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