________ and ________ Are the Hallmarks of the Experimental Method,setting

question 38

Multiple Choice

________ and ________ are the hallmarks of the experimental method,setting it apart from the observational and correlational methods.

• A) Factorial designs; dependent variables
• B) Probability levels; meta-analysis
• C) Random sampling; control over extraneous variables
• D) Random assignment; probability levels
• E) Control over extraneous variables; random assignment