Dr. Farah is an educational psychologist who is interested in studying the potential causal relationship between doing homework and academic achievement. In January, Dr. Farah has her students report their fall GPA (a measure of academic achievement) and estimate how many hours they spent doing homework during a typical week in the fall semester. In May, Dr. Farah measures the same variables again (the estimated number of hours spent doing homework during a typical week in the spring semester and their spring GPA) . She finds the following correlations.
Which of the following correlations is a cross-sectional correlation?
Definitions:
Geographical Boundaries
The demarcations that define the physical and sometimes political limits or borders between areas, regions, or territories.
Commuting Cost
The expenses associated with traveling from one's residence to their place of work or study.
Capitol
The building where a legislative body of a government meets, particularly associated with the United States Congress.
Industry
The collection of businesses and organizations involved in producing similar goods or services.
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