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Question: you may skip part e...

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(x -R)2 0 4 (a) Complete the entries in the table. Put the sums in the last row. What are the sample means x and y? (b) Calculate bi and b2 using (2.7) and (2.8) and state their interpretation. (c) Compute )vi. Using these numerical values, show that (d) Use the least squares estimates from part (b) to compute the fitted values of y, and plete the remainder of the table below. Put the sums in the last row. yi 0 (e) On graph paper, plot the data points and sketch the fitted regression line (5) On the sketch in part (e), locate the point of the means (*,J). Does your itted line pass through that point? If not, go back to the drawing board, literally (g) Show that for these numerical values y b+brt. (h) Show that for these numerical values , whee N (i) Compute σ2 G) Compute var(b2)

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