Answer:
Step-by-step explanatdion:
A. The population is All Students
Sample used is 155 volunteered students
Variable used are the emotional states(Guilt, Anger, Neutral)
B. Designed experiment. Its a type of experiment whereby a particular rule or method is imposed on some set of samples.
C. He found out that your emotional state affects decision making. In this case more of those in the guilt state refused to repair the old vehicle.
E. The method used, in this case, students were subjected to only reading and writing methods. Other methods should be used to check its reliability.