A statistics instructor measured student attitudes toward a statistics course prior to lectures, at the midterm, and

Question:

A statistics instructor measured student attitudes toward a statistics course prior to lectures, at the midterm, and after the final exam. Attitudes were measured on a 16-point scale, with higher scores indicating more positive attitudes toward the statistics course. Based on the results shown in the table, test whether or not attitudes differed using the Friedman test at a .05 level of significance. State whether to retain or reject the null hypothesis.