Epidemiology is the study of
a. the effectiveness of the correlational model in determining cause.
b. research methods.
c. various forms of therapy.
d. incidence, distribution, and consequences of a problem in a population.
Question 2
The correlation between the amount of time a college student studies and the student's height in inches is probably
a. positive.
b. negative.
c. zero.
d. causal.