4. Students in a healthcare policy course were asked to express their support for a particular health initiative before, during and after a series of lessons around the topic. Their ratings are below.

Student ID	Support Before	Support During	Support After
1	4	5	5
2	4	3	4
3	4	4	6
4	2	5	6
5	5	5	4
6	2	3	5
7	4	3	4
8	2	5	6

a. Write the null and alternate hypotheses for the study.

b. Conduct a repeated-measures ANOVA and interpret your findings.

c. Why do we not consider the variance between rows as important for studies of this type?