The engineer realizes that the jet engine will run more efficiently if she uses a bolt that is similarly shaped to the original bolt with the center of dilation at the origin but has a scale factor of 1/2. She plans to label the new bolt Hexagon A'B'C'D'E'F' on the coordinate plane.

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?