Question

Read the passage and based on it choose one of the given inferences that you draw from it. 

A true experiment is the only way that we can make causal inferences regarding the relationship between variables. A study that looks for differences in some outcome between naturally occurring groups is a “quasi experiment” and cannot establish whether changes in one variable cause changes in the other variable.

A quasi experiment is not a true experiment because-

1. It looks for differences in outcomes
2.  It makes faulty inferences
3.  It cannot establish relative change between variables
4. It determines and infers outcomes 
5. It has varied outcomes

Answer 1

Correct Answer - Option 3 :  It cannot establish relative change between variables
According to the passage--It cannot establish relative change between variables-- so option 3 is the right answer.