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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. Prior to At the After the Student Lectures Midterm Final A 6 5 12 B 4 9 14 C 8 7 14 D 12 11 16 E 5 7 9 Based on the results shown in the table, test whether or not attitudes differed using the Friedman test at a 0.05 level of significance. (Round your answer to two decimal places.) XR = X