Use the following to answer questions : 
-(Table: The Production Possibilities for Tractors and Crude Oil) Look at the table The Production Possibilities for Tractors and Crude Oil. Both the United States and Mexico will gain from trade if one tractor trades for _____ barrels of oil.
Definitions:
Correlational Research
Research that examines the relationships between variables, whose purpose is to examine whether and how two variables change together.
Correlational Coefficient
A statistical measure that indicates the extent to which two or more variables fluctuate together, ranging from -1 to 1, where values closer to 1 or -1 represent a stronger relationship.
Cause-And-Effect Relationships
A connection between two events where one event (the cause) leads to the occurrence of another event (the effect).
Survey Method
A research method involving the collection of data from a predefined group of respondents to gain information and insights on various topics of interest.
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