Prior to taking an aerobics class, each of 12 health club members is asked to rate the instructor on a scale in which 3 excellent, 2 good, and 1 poor Following the class, each student is again asked to rate the instructor Given the following before and after ratings, use the 0 05 level in determini...

The sign test is appropriate for this problem For d x pre x post the null and alternative hypotheses ...

Prior to taking an aerobics class, each of 12 health-club members is asked to rate the instructor

Question:

Prior to taking an aerobics class, each of 12 health-club members is asked to rate the instructor on a scale in which 3 = €œexcellent,€ 2 = €œgood,€ and 1 = €œpoor.€ Following the class, each student is again asked to rate the instructor. Given the following before €“and after ratings, use the 0.05 level in determining whether there has been a significant improvement in the ratings received by the instructor.