If cov(x, y) = 20, 
and 
then the sample coefficient of correlation r is:
Definitions:
Folkways
Informal norms or customs that guide everyday conduct and social interactions within a particular culture or community.
William Sumner
A pioneering American sociologist and economist known for his work on social Darwinism and folkways.
Social Control
Social control involves mechanisms, both formal and informal, that regulate individual and group behavior, aiming to conform to the norms and laws of a society.
Cultural Innovation
The introduction and adoption of new cultural practices, ideas, or objects, often leading to significant changes in society's norms and values.
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