In conducting hypothesis testing for difference between two means when samples are dependent (paired samples),the variable under consideration is 
; the sample mean difference between the pairs.
Definitions:
Same-Sex Marriage
A legally recognized marriage between two individuals of the same gender.
The Netherlands
A country located in Northwestern Europe, known for its flat landscape, extensive canal system, windmills, tulip fields, and cycling routes.
United States
A country in North America composed of 50 states, a federal district, five major self-governing territories, and various possessions, known for its significant cultural and economic influence globally.
Canada
A country in North America known for its vast landscapes, multicultural diversity, and as the second largest country by total area.
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