For a test of a mean, which of the following is incorrect? A)H₀ is rejected when the calculated p-value is less than the critical value of the test statistic. B)In a right-tailed test, we reject H₀ when the test statistic exceeds the critical value. C)The critical value is based on the researcher's chosen level of significance. D)If H₀: μ ≤ 100 and H₁: μ 100, then the test is right-tailed.

Question

For a test of a mean, which of the following is incorrect? A)H₀ is rejected when the calculated p-value is less than the critical value of the test statistic. B)In a right-tailed test, we reject H₀ when the test statistic exceeds the critical value. C)The critical value is based on the researcher's chosen level of significance. D)If H₀: μ ≤ 100 and H₁: μ > 100, then the test is right-tailed.

Quizplus · Accepted Answer

Option A is incorrect because we reject H₀ when the calculated p-value is less than the chosen level of significance (usually 0.05) and not when it is less than the critical value of the test statistic. The critical value is used to determine the rejection region for the test statistic based on the level of significance and degrees of freedom.

For a Test of a Mean, Which of the Following