An NHL executive says that players who incur penalty time during a game have a median time of 1.2 minutes in the penalty box. A random sample of 28 hockey players with penalty time produced 24 non-zero differences when a Wilcoxon signed rank test was used. The W (R+) equaled 156.5 . The alternate hypothesis is m ? 1.2 minutes. Assume the population is symmetrically distributed. The computed
test statistic in this instance equals:
a. 156.5.
b. 0.186.
c. 6.5.
d. 35.
e. 143.5.
B
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