Dr. Stanley would like to find out whether her study guide helps students perform better on exams. She placed all her female students in Group 1 and all her male students in Group 2. The females in Group 1 received her study guide and the males in Group 2 received no study guide. Then after three weeks, all the students were given a exam and their scores are compared. In this study, what is the independent variable? (1 pt) In this study, what is the dependent variable (1 pt) Is there a problem with how the subjects were placed into groups? Why or why not? (1 pt) What is the name given to the group which was not given the study guide? (1 pt)