Wyatt spends a winter day recording the temperature once every three hours for science class. At 9 am, the temperature was -8.8°F. Between 9am and noon, the
temperature increased by 13.6°F. Between noon and 3pm, the temperature decreased
by 6.9°F. Between 3pm and 6pm, the temperature went down 2.1°F. What was the
temperature at 6pm?

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?