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

question 11

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.