Suppose a furniture manufacturer ships their products to distributors in pairs (so there are two items sent in each box). the weights of furniture pieces vary significantly, but the manufacturer wants to make sure the weight of each package is about the same. from this information, the correlation between the weights of the two individual furniture pieces will be

a) positive.
b) negative.
c) 0.
d) cannot be determined.

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?