A student believes that the average grade on the final examination in statistics is at least 85. She plans on taking a sample to test her belief. The correct set of hypotheses is A) H0: μ 85 C) H0: μ ≥ 85 Ha: μ 85 Ha: μ ≤ 85

Question

A student believes that the average grade on the final examination in statistics is at least 85. She plans on taking a sample to test her belief. The correct set of hypotheses is A) H0: μ < 85 Ha: μ ≥ 85 B) H0: μ ≤ 85 Ha: μ > 85 C) H0: μ ≥ 85 Ha: μ < 85 D) H0: μ > 85 Ha: μ ≤ 85

Quizplus · Accepted Answer

The student wants to test if the average grade (μ) is at least 85, which translates to a one-tailed test with the alternative hypothesis being that the mean is less than 85 (μ < 85). The null hypothesis, in turn, is that the mean is greater than or equal to 85 (H0: μ ≥ 85). Therefore, the correct set of hypotheses is C) H0: μ ≥ 85 Ha: μ < 85.

A Student Believes That the Average Grade on the Final