For Exercises 16.27 and 16.28, see page 16-17; for 16.29 and 16.30, see page 16-19.
16.30 Significance test for lower-ranked spas.
Refer to Exercise 16.28 (page 16-17). Find μW+, σW+, and the Normal approximation for the P-value for the Wilcoxon signed rank test.
spas4