The systematic elimination of extraneous variables other than ...

[naturalchemist]

The systematic elimination of extraneous variables other than those you are interested in can be eliminated in what research design?
 
  a. qualitative research.
  b. correlational research.
  c. experimental research
  d. longitudinal research.

Question 2

If a researcher wanted to see how voting patterns have changed over the past few decades, the most useful approach is likely to be
 
  a. observational research.
  b. archival research.
  c. experimental research
  d. longitudinal research.

[peter]

Answer to Question 1

c

Answer to Question 2

b

[naturalchemist]

TYSM

[gcook]

Thanks for the timely response, appreciate it