A researcher calculates a mean from a sample of 24 people. In analyzing her data, she states the following hypotheses: H₀: μ = 20 and H₁: μ ≠ 20. For α = .05, what is the appropriate critical value for her statistic? A) 1.714 B) 2.086 C) 2.069 D) 2.064

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The appropriate critical value for a two-tailed test with α = .05 and degrees of freedom (df) = 23 (since df = n - 1 for a sample size of 24) is 2.069, which corresponds to the t-distribution critical value for these parameters.

A Researcher Calculates a Mean from a Sample of 24