Use the data set yx 7 50 100 40 70 2 15 30 10 20 (a) Plot
Chapter 11, Problem 11.29(choose chapter or problem)
Use 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 (in terms of the \(y_i\) and the slope \(b_1\)) for the estimator of \(\sigma^2\).
(e) Give a formula for Var(\hat{y}_ii), i = 1, 2, . . . , n, for this case.
(f) Plot 95% confidence limits for the mean response on the graph around the regression line.
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