An NBA executive says that players who substitute as the sixth, seventh and eighth positions for the games starting five players have a median playing time of 24 minutes. A random sample of 25 substitutes (6, 7 or 8) produces 20 non-zero differences in a Wilcoxon signed rank test and a W (R+) equal to 146 . The alternate hypothesis is m ? 24 minutes. Assume the population is symmetrically
distributed. The computed test statistic in this situation equals:
a. 146.
b. 24.
c. 25.
d. 1.53.
e. 41.
D
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