Experimental Studies In an experimental study, researchers manipulate something to investigate if there is an effect. In this type of study, researchers apply a treatment for some of the study participants in order to make inferences about a treatment. The following are examples of experimental studies. You will be asked to analyze the characteristics of these studies. 4) Study #4: In order to determine the effects of walking on student stress levels, researchers randomly divided the students in a health class into two groups. The researchers told one group to walk one mile every day for an entire month, and they told the other group to walk five miles every day for an entire month. At the end of the month, students were surveyed on their stress levels using a five-point rating scale. Part A: Who are the study participants in Study #4? Part B: A response variable is the data collected from participants in a study after some treatment. What is the response variable in this study? Is this variable a quantitative variable or a categorical variable? Part C: Did the researchers apply a treatment in Study #4? If so, describe the treatment