Given the following data,compute the mean squared deviation (error). 
Definitions:
Social Inequality
A condition in society where privileges, opportunities, and wealth are distributed unequally among different social groups.
Industrialization
The economic and social transformation that occurs when a society shifts from primarily agricultural activities to mass production of goods and services using industrial methods.
Proletariat
The class of wage-earners in a capitalist society whose only significant material value is their labor power.
Bourgeoisie
The social class that owns the means of production and is characterized by their wealth, social status, and influence.
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