In a multiple regression problem with two explanatory variables if,the fitted regression equation is 
then the estimated value of Y when 
and 
is 49.4.
Definitions:
Labor Force
The total number of people employed and actively seeking employment within an economy.
War Theory
A subset of military theory that explores the philosophies, ethics, and logistics of warfare and conflict.
Expansion Phase
A period in the business cycle during which the economy grows and unemployment decreases.
World War II
A global conflict that lasted from 1939 to 1945, involving most of the world's nations, including all of the great powers, organized into two opposing military alliances: the Allies and the Axis.
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