State the appropriate nonparametric test for each of the following examples.
(a) A physiological psychologist compares differences in the amount of chemical activity in a certain brain region between a group of cocaine-dependent rats and a group of nicotine-dependent rats.
(b) A social psychologist surveys a sample of women to test the claim that the average person drinks 32 ounces of soda per week.
(c) A clinician measures the difference in metabolic rates between pairs of identical twins.
(d) Each day for one week, a consultant records the amount of physical activity in a sample of patients suffering from depression.
(e) A personality psychologist measures neuroticism in a sample of teenage university students, community college students, and high school dropouts.