Which of the Following Statements Is True About the Sign

Multiple Choice

Which of the following statements is true about the sign test for paired data?

A) The sign test relies only on the signs of the differences in pairs, not the values of the differences.
B) The sign test relies only on the values of the differences in pairs, not the signs of the differences.
C) The sign test is a nonparametric test because it makes two assumptions about the distributions of the populations.
D) The sign test is most useful if you know your data are normally distributed.