Please help...A counselor wishes to examine the benefits of a parenting class on parenting skills. He decides to administer a questionnaire to the 10 parents who have
attended the most recent class. How could this study be improved?
Select all that apply.
A. Administer a questionnaire to parents who have not attended the
class.
B. Use a random sample of all patients, who have attended the
class.
C. Increase the sample size.
D. Give parents some sample responses, prior to administering the
questionnaire.