The examinations in a large accounting class are scaled afte

The examinations in a large accounting class are scaled after grading so that the mean score is 75. The professor thinks that one teaching assistant is a poor teacher and suspects that his students have a lower mean score than the class as a whole. The TA\'s students this semester can be considered a sample from the population of all students in the course, so the professor compares their mean score with 75. State the hypotheses H0 and Ha.

A. H0 : x = 75 vs. Ha : x < 75 B. H0 : ? = 75 vs. Ha : ? ? 75 C. H0 : ? = 75 vs. Ha : ? > 75 D. H0 : ? = 75 vs. Ha : ? < 75 E. H0 : ? < 75 vs. Ha : ? = 75

Solution

H₀ : ? = 75 vs. H_a : ? > 75-correct answer-100% sure