Which of the following accurately describes either the purpose or benefit, if any, of implementing controls in the design of an experiment? Check all that apply. Group of answer choices

A. By controlling variables, the differences observed in the response variable can be attributed to the treatment and not some other factor.

B. There is no benefit of control in the experiment.

C. By controlling variables that may influence the response variable, we eliminate variability in the response variable.

D. By controlling variables in the experiment, we eliminate the need to have a control group.

E. By controlling variables that may influence the response variable, we reduce variability in the response variable.

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.