In a normal approximation to the Wilcoxon signed rank test,the test statistic is calculated as z = 1.26.For a two-tail test,the p-value is:
A)0.2076
B)0.3962
C)0.1238
D)0.3974

Question

Quizplus · Accepted Answer

In a normal approximation to the Wilcoxon signed-rank test, the test statistic is compared with a standard normal distribution to obtain the p-value. For a two-tailed test, the p-value is twice the area in the tails beyond the absolute value of the test statistic. In this case, the absolute value of the test statistic is 1.26, so the area in each tail beyond 1.26 is 0.1038. Therefore, the p-value is 2*0.1038 = 0.2076.

In a Normal Approximation to the Wilcoxon Signed Rank Test,the