this is the mc questions about my subject - research method,plz help to answer!

6. In studying the effects of political movement on students' conformity behaviour, which is a preferred design? a. ABA b. deviant case analysis c. interrupted time series d. none of the above 7. A psychologist who wishes to demonstrate the effect of a therapeutic technique on a few of his patients may use a. a between-subjects factorial design b. small n type experiments c. random assignment of subjects d. natural treatment 8. In relational studies, one uses chi square or r to test the significance of relationship between variables; in experimental studies, to find out whether experimental conditions are significantly different, one uses a. regression b. alpha c. Pearson's r d. the F test or the t test 9. In counter-balancing 3 within-subjects conditions not using a latin square, one needs at least participants. a. 3 b. 6 c. 12