If you were performing a wilcoxon signed ranks test, which of the following is most likely to be your null hypothesis?

a. mu1-mu2=mu3=mu4

b. median condition 1- median condition 2

c. median condition 1- median condition 2- median condition 3=median condition 4

mu1-mu2

Suppose a subject is in a repeated measures experiment and become tired after exposure to a number of condition and therefore, has his/her performance decline. What do we call this type of carryover effect?

a. habituation

b. learning

c. fatigue

d. sensitization