The significance level for a Wilcoxon signed rank sum test is 0.05. The alternative hypothesis is stated as: The location of population 1 is different from the location of population 2. The appropriate critical value for a sample of size 20 (that is the number of nonzero differences is 20) is:

A) 37
B) 43
C) 52
D) 60
E) 48

Significance Level

A threshold in hypothesis testing that determines the probability of rejecting a null hypothesis when it is true, commonly set at 0.05 or 5%.

Wilcoxon Signed Rank Sum Test

A non-parametric statistical hypothesis test used to compare two related samples, matched samples, or repeated measurements on a single sample to assess whether their population mean ranks differ.

Nonzero Differences

Differences between values or measurements that are not equal to zero, indicating variation or change.