A linear regression model y = Bo + Bxi + (i = 1, 2,...,n) can be...

 

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A linear regression model y = Bo + Bxi + (i = 1, 2,...,n) can be written as Y Xe where = Y1 1 Y2 Bo Y = and 3= 3, Yn (a) Write the matrix X. (We did this in class) (b) Consider a model with two explanatory variables, y = o + Bx1i + B2x2i + i (i = 1, 2,...,n). This model can be also written as Y = X+e. Write the matrix X for this model. What else should be changed? A linear regression model y = Bo + Bxi + (i = 1, 2,...,n) can be written as Y Xe where = Y1 1 Y2 Bo Y = and 3= 3, Yn (a) Write the matrix X. (We did this in class) (b) Consider a model with two explanatory variables, y = o + Bx1i + B2x2i + i (i = 1, 2,...,n). This model can be also written as Y = X+e. Write the matrix X for this model. What else should be changed?