Below is a partial multiple regression ANOVA table. 
What is the mean square error?
Definitions:
Spinal cord
The cylindrical bundle of nerve fibers and associated tissue that is enclosed in the spine and connects nearly all parts of the body to the brain.
Frontal lobe
The part of the brain located at the front of each cerebral hemisphere, associated with reasoning, motor skills, higher level cognition, and expressive language.
Motor activity
Physical movements and actions generated by the body's muscle system.
Brain
An organ of the central nervous system in vertebrates, located in the skull and functioning as the primary center for controlling bodily activities and cognitive functions.
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