Consider a regression analysis with three independent
Chapter 0, Problem 14.11(choose chapter or problem)
Consider a regression analysis with three independent variables x1, x2, and x3. Give the equation for the following regression models: a. The model that includes as predictors all independent variables but no quadratic or interaction terms y 1.8 .1x1 .8x2 e x4 x2 2 2 x3 x2 1 x2 planting density 1plants/ha2 x1 planting date 1days after April 202 y percent maize yield b. The model that includes as predictors all independent variables and all quadratic terms c. All models that include as predictors all independent variables, no quadratic terms, and exactly one interaction term d. The model that includes as predictors all independent variables, all quadratic terms, and all interaction terms (the full quadratic model) 1
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