Data for research may be gathered by:
a. Interviews.
b. Questionnaires.
c. Physical examinations.
d. Any of the above choices.
Question 2
A comparison group is made of:
a. Persons who are exposed to the policy and persons with a similar problem who are not exposed to the policy.
b. Persons who are exposed to the policy who have had different results.
c. Persons who should be exposed to the policy and persons who do not share their problem.
d. Two different groups of evaluators.
