Compute the Wilcoxon signed-ranks T test on the data in Question 20. Is your conclusion the same? Explain why or why not.
In Questions 20
A local school introduces a new academic program designed to improve students' grade point average (GPA) scores. To test the program, they select a sample of 10 students and measure the difference in their GPA scores before and after this program. Test whether or not scores improved following this program using the related-samples sign test at a .05 level of significance and state whether to retain or reject the null hypothesis.
Change in GPA following the Program
+0.20 ............................................. +0.05
-1.99 ............................................. +0.55
+0.25 ............................................. +0.63
+0.23 ............................................. +0.10
+0.54 ............................................. +1.09