Which nonparametric method is appropriate for analyzing these ...

[ETearle]

Which nonparametric method is appropriate for analyzing these data?
 
  What will be an ideal response?

Question 2

Two-tailed tests ________.
 
  A) have only lower critical values
  B) have only upper critical values
  C) have both upper and lower critical values
  D) do not have any critical values

[ally]

Answer to Question 1

The Wilcoxon signed rank test.

Answer to Question 2

C