Generally, the Supreme Court has final appellate jurisdiction over both State and federal cases involving preserved federal questions
Answer: 4
(IV)
Explanation:
From the question, the researcher is interested in determining whether smiling and warmth impact the number of friends one has.
The variables are; Amount of smiling (a little, a lot) and self-rated warmth (cold, warm).
Manipulating the variables by the researcher or experimenter is called the free variables(IV). It is free to be varied. What is to be measured is called the dependent variable(∆V); it depends in the manipulation of free variables
