A statistics instructor measured student attitudes toward a statistics course pr

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 0.05 level of significance. State whether to retain or reject the null hypothesis. Retain the null hypothesis. Reject the null hypothesis. You may need to use the appropriate table in Appendix B to answer this question.

Explanation / Answer

Using Minitab:

Friedman Test: Response versus Student blocked by Block

S = 8.47 DF = 4 P = 0.076
S = 8.61 DF = 4 P = 0.072 (adjusted for ties)

                        Sum of
Student N Est Median   Ranks
A        3       5.800     5.0
B        3       9.200     8.5
C        3       8.600    10.5
D        3      12.400    15.0
E        3       6.000     6.0

Grand median = 8.400

P-value 0.076 > 0.05 we do not reject null hypothesis

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