Using the following regression analysis: 
What is the residual mean square?
Definitions:
Experiment Results
The data and findings obtained from conducting a scientific experiment to test hypotheses or theories.
Language Invention
The creative process of developing a new language, sometimes for fictional purposes, linguistic experiments, or enhanced communication needs.
Orphanages
Institutions dedicated to the care of children whose parents are deceased or otherwise unable to care for them.
Basque Language
A language of the Basque people, indigenous to the Pyrenees region of France and Spain, characterized by its pre-Indo-European roots.
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