The basis of an experiment is

The basis of an experiment is
 
  a. manipulation of a dependent variable.
 b. manipulation of an independent variable.
  c. Manipulation of a confounding variable.
  d. in-depth fact gathering of many variables.

Question 2

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 3

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.

Question 4

The more time one spends exercising, the less one generally weighs. The correlation between time on a treadmill each month and overall body weight would represent a
 
  a. positive correlation.
  b. zero correlation.
 c. negative correlation.
  d. causal correlation.

Question 5

As a child's age increases, so does her height. This is an example of a(n)
 
  a. negative correlation.
  b. zero correlation.
 c. causal correlation.
 d. positive correlation.