Which of the Following Statements Correctly Describes the Sign Test

Multiple Choice

Which of the following statements correctly describes the sign test?

A) It often uses the directions of differences observed in matched pairs sample to determine whether the relative frequency distributions of two statistical populations are identical to or different from one another.
B) It is often used to determine whether a sample comes from a population with a specified median.
C) Both (a) and (b) .
D) Neither (a) nor (b) .