The ________ of a study refers to the degree to which the IV was ...

[karlynnae]

The ________ of a study refers to the degree to which the IV was the only reason for changes on
  the DV, i.e., were there extraneous or nuisance variables that disrupted the IV-DV relationship.
 
  A) external validity B) diffusion of treatment
  C) randomization D) internal validity

Question 2

You find that people who weigh more tend to have higher levels of cholesterol. You have found
  that these two variables
 
  A) are negatively correlated B) have equal levels of variability
  C) are significantly different D) are positively correlated

[meow1234]

Answer to Question 1

D

Answer to Question 2

D

[karlynnae]

Excellent

[AmberC1996]

Gracias!