The variable systematically changed or manipulated by a ...

[hubes95]

The variable systematically changed or manipulated by a researcher in an experiment is called the
 
  a. independent variable.
  b. correlational variable.
  c. dependent variable.
  d. extraneous variable.

Question 2

In order to make statements about the population from information obtained from a sample, we must use
 
  a. an experimental design.
  b. a correlational design.
  c. inferential statistics.
  d. descriptive statistics.

[kbennett34]

Answer to Question 1

a

Answer to Question 2

c