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

Critical Value

A threshold in hypothesis testing that determines whether to reject the null hypothesis, based on the distribution of a test statistic.

Hypotheses

Are statements or predictions that can be tested by scientific research to either be supported or refuted through evidence.

Alpha

The preset significance level in hypothesis testing, often determining the threshold for the probability of making a Type I error.