Suppose the Wilcoxon Signed-Rank Test Was Used on Ten Pairs

Multiple Choice

Suppose the Wilcoxon signed-rank test was used on ten pairs of data. If the calculated test statistic for a two-tailed test was found to be 6, at α = 0.05 we can conclude that

A) the null hypothesis should be rejected and the median of the differences is not zero.
B) the null hypothesis should not be rejected and the median of the differences is zero.
C) we know that the groups are the same.
D) the alternative hypothesis should be rejected and there is no difference between the pairs.
E) all groups are the same, as T = 6 < Tcrt = 8.