Examlex
Which of the following is true about the GNI of the United States?
Correlation
Correlation is a statistical measure that indicates the extent to which two or more variables fluctuate together.
Observational Studies
Research methods where the investigator observes subjects without manipulation, aiming to find correlations between variables.
Planetary Motion
The movement of planets around a star, such as the orbit of Earth and other planets around the Sun.
Proxy Variable
An auxiliary variable used in statistical analyses to represent an unobservable or difficult-to-measure variable.
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