8. A poll with two options was taken by 400 people, and found 40% support for option A.
Which of the following values are statistically
possible for the actual support for option A in the
population?
I. 35% II. 40% III. 42% IV 44%
(A) II only (B) I and II only (C) II and III only
(D) II, III and IV only (E) I, II, III and IV

Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?