Question: Given the data set (a) Plot the data. (b) Fit a regression line ''through the origin. (c) Plot the regression line on the graph with

Given the data set

(a) Plot the data.

(b) Fit a regression line ''through the origin."

(c) Plot the regression line on the graph with the data.

(d) Give a general formula for (in terms of the y i and the slope b) the estimator of ?2.

(e) Give a formula for V ar (y i); i = 1, 2. . . n for this case:.

(f) Plot 95% confidence limits Tor the mean response on the graph around the regression line.

40 15 70 20 10 50 100 30

40 15 70 20 10 50 100 30

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