You test the mean of a sample of 19 people and calculate a value of 2.14 for the t-statistic. For α = .05 (two-tailed), which of the following decisions is MOST appropriate? A) do not reject null (p .01) B) reject null (p .05) C) accept alternative (p .05) D) reject null (p

Question

You test the mean of a sample of 19 people and calculate a value of 2.14 for the t-statistic. For α = .05 (two-tailed), which of the following decisions is MOST appropriate?
A) do not reject null (p > .01)
B) reject null (p > .05)
C) accept alternative (p > .05)
D) reject null (p < .05)

Quizplus · Accepted Answer

For a two-tailed test with 18 degrees of freedom (n-1 = 19-1), the critical t-value at α = .05 is approximately ±2.101. Since the calculated t-statistic of 2.14 is greater than 2.101, we reject the null hypothesis at the 0.05 significance level.

You Test the Mean of a Sample of 19 People