Hi, i think I have the concept , but i am not quite sure. Please help.

Identifytheappropriate nonparametrictest for each of the following examples and explain why a nonparametric test is appropriate.

1. A researcher measured student scores on an identical assignment to see how well students perform fordifferent typesof professors. In Group Adviser, their professor was also their adviser; in Group Major, their professor taught in their major field of study; in Group Nonmajor, their professor did not teach in their major field of study. Student scores were ranked in each class, and the differences in ranks were compared.Kruskal-Wallis test for a oneway_ANOVA___________________________
2. A researcher has the same participants rank two types of advertisements for the same product. Differences in ranks for each advertisement were compared. __Paired sample sign test because it is a pairedobservations.____________________
3. A professor measures student motivation before, during, and after a statistics coursein a givensemester. Student motivation was ranked at each time in the semester, and the differences in ranks were compared.___________________________________