Discussion:
Q1: Below are grade point averages for 25 randomly chosen university business students during a recent semester. Research question: At α = .01, are the median grade point averages the same for students in these four class levels? GPA
Grade Point Averages of 25 Business Students
Freshman Sophomore Junior Senior
(5 students) (7 students) (7 students) (6 students)
1.91 3.89 3.01 3.32
2.14 2.02 2.89 2.45
3.47 2.96 3.45 3.81
2.19 3.32 3.67 3.02
2.71 2.29 3.33 3.01
2.82 2.98 3.17
3.11 3.26
Q2: Prof. Green's multiple-choice exam had 50 questions with the distribution of correct answers shown below. Research question: At α = .05, can you reject the hypothesis that Green's exam answers came from a uniform population? Correct
Correct Answer Frequency
A 8
B 8
C 9
D 11
E 14
Total 50