5. Students were randomly assigned as group 1 {treatment group) and group 2 {control group}. Is group 1 better than group 2 on the test? E. Is gender associated with smoking withdrawal behaviour (measured on a scale of 1- easy to withdraw to 1G very difficult to withdraw}. ?. A teacher is interested to know if the grades of her students for the 2'\"CI grading significantly improve compared to their first grading 3. Does educational attainment of the father (elementary, high school or college) affect students IQ? El. Is educational attainment of the father {elementary, high school, college) associated with IQ (low, average or high) ? It}. Do the examinees' gender, type of school, average grades in general education, professional education, and major course affect performance in the Licensure examination for Teachers [LET]? 11. Are there signicant difference between students stress levels {scores were ranked from highest to lowest) after they were asked to drink chocolate milk, coffee and tea. 12. Is there a relationship between students' age, IQ and academic achievement (grades)? 13. Does test anxietyr predict test scores? 14. Is type of school {public or private} associated with Licensure Examination for Teachers {LET} performance {Passed or Failed). 15. Smdents were randomly assigned as group 1 (treamient group) and group 2 {control group]. They were given a test and scores were ranked. Is group 1 better than group 2 ? 15. Is there a significant relationship between smdeuts' ranks in Math and Science? 1?. Is gender related to Board Exam Rating {actual percentage scores)? 13. Is type of review {self-pair-group) associated with students' ranked scores in Science