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Regression analysis and Co variance matrix

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A) Find the least square estimates for the unknown regression parameters and the estimate of the covariance matrix. Show all works.
b) Fill-in the value for the ANOVA table. Show all works.

c) Compute R2. Show all works.
d) Is the X1 significant after X2 has been included in the model? Explain your answer and show all necessary works.

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The solution provides step by step method for the calculation of regression model and covariance matrix . Formula for the calculation and Interpretations of the results are also included.

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