offe of your professors uploads videos of the course to a website. one day, he analyzes results from last year's class and discovers that students' performance in the course is related to how often they viewed the videos. Students who viewed the videos frequently tended to perform less well on the final exam than students who viewed the videos relatively rarely. Upon discovering this, your professor announces that he will stop recording lectures because, he says, the videos have been shown to cause students to perform more poorly on the course. In answering the following questions, use clear and simple language even a professor might be able to understand. a. Do you think the data used in this study constitute experimental data (in the sense used in this course) or observational data? b. Explain why the number of lectures attended could be a potential confounding factor when considering the relationship between the frequency of viewing videos and performance on the course. c. Can you think of potential mediating factors? d. Draw causal graphs for a confounding factor and for a mediating factor. e. Using a potential confounding factor, draw a hypothetical Paik-Agresti diagram to show how students who view the videos frequently might do more poorly than those who view them rarely, even though viewing videos may make a positive contribution for individual students in the ourse