Question: You have constructed a simple linear regression model and are testing whether the assumption of constant variance in the residuals in this model is reasonable.

You have constructed a simple linear regression model and are testing whether the assumption of constant variance in the residuals in this model is reasonable. Select the scatter plot that indicates constant variance in the residuals: 15- 18- 16- 10 14- O Residual 100 -10- Response variable 12 10 50 + 62 70 O -5 15 ON 0 0.5 1.5 2 25 3.5 Explanatory value Explanatory variable 1- 1 10 . . . . . . O Residual O Residual 110 120# 130 140 150 160 170 * 180 -5 LUNSONHAU -10. -2 -1.5 -1 -0.5 0 05 1.5 2 Explanatory value z score

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