In a Psychological Study of Distance Perception, Introductory Psychology Class

In a psychological study of distance perception, introductory psychology class volunteers were given 5, 10, or 15 extra credit points depending on their level of participation in the experiment. They walked along paths laid out along hallways in the psychology building, and were asked to judge the distance they had walked. Each path distance was between 100 and 200 feet in length, and contained from two to seven 90 degree turns. The investigators also kept track of class standing (freshman, sophomore, junior, or senior). For each of the variables in this study, determine whether it is categorical or numerical. For each numerical variable, determine whether it is discrete or continuous: (a) The true length of the path (b) The amount of credit given to the volunteers (c) The length of the path as judged by the students (d) The number of 90 degree turns (e) Class standing