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Given are data for two variables, x and y. X; yi 6 7 15 13 18 20 20 30 (a) Develop an estimated regression equation
Given are data for two variables, x and y. X; yi 6 7 15 13 18 20 20 30 (a) Develop an estimated regression equation for these data. (Round your numerical values to two decimal places.) V = (b) Compute the residuals. (Round your answers to two decimal places.) X ; y ; Residuals 11 15 13 18 20 20 30 (c) Develop a plot of the residuals against the independent variable x. N N Residuals Residuals O Residuals o O -2 -2 -2 -4 -4 -6- - 6 -6- 5 10 15 20 25 5 10 15 20 25 0 5 10 15 20 25 O X X AON Residuals N -6- 0 5 10 15 20 25 O X Do the assumptions about the error terms seem to be satisfied? The plot suggests ---Select--- in the residuals indicating that the error term assumptions ---Select-- | be satisfied. (d) Compute the studentized residuals. (Round your answers to two decimal places.) X ; yi Studentized Residuals 11 15 13 18 20 20 30 (e) Develop a plot of the studentized residuals against y. N W N OHNW Studentized Residuals Studentized Residuals Studentized Residuals O O -1 N -2 -3 -3- -3- 5 10 15 20 25 30 0 5 10 15 20 25 30 0 5 10 15 20 25 30 ON OH Studentized Residuals -2 -3 0 5 10 15 20 25 30 O y What conclusions can you draw from this plot? The studentized residual plot has |---Select--- the original residual plot. The plot suggests ---Select--- in the residuals indicating that the error term assumptions |---Select--- |be satisfied
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