Wheat production in example 7 of section 2.4, the u. s. corn production (in billions of bushels) was modeled by the function
p(t)=1.0757(1.0248)^t,
, where t was the time (in years) since 1930. source: the new york times magazine.
(a) find the average corn production from 1930 to 1950.
(b) find the average corn production from 2000 to 2010.

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?