Which variables are manipulated by the researcher(s) in an ...

[rachel9]

Which variables are manipulated by the researcher(s) in an experiment?
 
  a. dependent variables
  b. independent variables
  c. codependent variables
  d. confounding variables

Question 2

The reason that most research on aging is not truly experimental is because
 
  a. age cannot be measured accurately in most people.
  b. most statistical techniques are not able to use age as a variable.
  c. age cannot be manipulated, so it cannot be an independent variable.
  d. it is hard to get large enough samples to represent different age groups.

[Briannahope]

Answer to Question 1

ANSWER: b

Answer to Question 2

ANSWER: c

[rachel9]

Thanks for the timely response, appreciate it

[carlsona147]

Wow, this really help