_____ can often be tested by holding one variable constant while changing the other to determine effects of the change.
A)Causation
B)Improper sampling
C)Noncomparable data
D)Uncritical projection of trends

Question

Quizplus · Accepted Answer

Holding one variable constant while changing the other is known as a controlled experiment, and it is a common way to test causation. By controlling all variables except for the one being tested, researchers can determine if changes in one variable cause changes in another variable. Improper sampling, noncomparable data, and uncritical projection of trends are not related to this method of testing.

_____ Can Often Be Tested by Holding One Variable Constant