Question

Select the correct answer.

In which research method does a researcher change the value of one variable to determine how the change affects another variable?
A.
experiment
observational research
C. survey
D. case study

Answer 1

• A

Step-by-step explanation:

Experiment observation research:

it measure or Survey members of a sample without trying to affect them in a controlled experiment, and assign people or things to groups and apply some variable to one of the group's