Online classes are becoming more and more prevalent at the college level. A statistics instructor randomly sampled ten students from his traditional face-to-face class and ten students from his online class to compare their comprehension of the material that was taught in the class. He administered the same final exam to each student and wants to use the Wilcoxon Rank Sum test to compare their exam scores. The results are shown below:
| Traditional Class | Online Class |
What alternative hypothesis should the instructor test to show that the students in the traditional class outperformed the students in the online class?
◦ The distribution of exams scores for the traditional class is shifted to the right of the distribution of exams scores for the online class.
◦ The distribution of exams scores for the traditional class is shifted to the right or to the left of the distribution of exams scores for the online class.
◦ The distribution of exams scores for the traditional class is identical to the distribution of exams scores for the online class.
◦ The distribution of exams scores for the traditional class is shifted to the left of the distribution of exams scores for the online class.
They are divided into four classes: all α, all β, α/β, and α + β
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