Question: 45. Given are data for two variables, x and y. xi 6 11 15 18 20 yi 6 8 12 20 30 a. Develop an

45. Given are data for two variables, x and y.

xi 6 11 15 18 20 yi 6 8 12 20 30

a. Develop an estimated regression equation for these data.

b. Compute the residuals.

c. Develop a plot of the residuals against the independent variable x. Do the assumptions about the error terms seem to be satisfied?

d. Compute the standardized residuals.

e. Develop a plot of the standardized residuals against yˆ. What conclusions can you draw from this plot?

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