The General Electric Service Department Believes That the Median Time

Multiple Choice

The General Electric service department believes that the median time for a service call should be 30 or fewer minutes.To test this,the following random sample of service times was collected: Given that the managers do not wish to make the assumption that the population is normally distributed,the test statistic for the Wilcoxon signed rank sum test is:

A) W = 43.0.
B) W = 27.0.
C) W = 18.0.
D) None of the above.