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Answer True or False. When we add an X3 variable to a model that previously included...

Answer True or False. When we add an X3 variable to a model that previously included only a single X variable (i.e., what we called the Simple Regression Model in Chapters 1 and 2), the Total Sum of Squares will decrease.

Answer True or False. When we add an X3 variable to a model that previously included only a single X variable (i.e., what we called the Simple Regression Model in Chapters 1 and 2), the Total Sum of Squares will increase.

Answer True or False. When we add an X3 variable to a model that previously included only a single X variable (i.e., what we called the Simple Regression Model in Chapters 1 and 2), the Residual Sum of Squares will decrease, unless the true (i.e. population) value of beta3 is zero.

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False. As Total Sum of Squares will not change as it is not depend on variable addition.

False. As Total Sum of Squares will not change as it is not depend on variable addition.

True : When we add an X3 variable to a model that previously included only a single X variable (i.e., what we called the Simple Regression Model in Chapters 1 and 2), the Residual Sum of Squares will decrease, unless the true (i.e. population) value of beta3 is zero.

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