A researcher calculates a mean from a sample of 18 people. In analyzing her data, she states the following hypotheses: H₀: μ = 20 and H₁: μ ≠ 20. For α = .05, which is an appropriate critical value? A) 1.734 B) 2.110 C) 2.101 D) 2.086

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Given that the sample size is 18, the degrees of freedom for the t-test would be 17 (n-1). For a two-tailed test with α = .05, the critical value from the t-distribution table for 17 degrees of freedom is approximately 2.110.

A Researcher Calculates a Mean from a Sample of 18