For the Second-Order Polynomial Model $E ( y ) = \beta _ { 0 } + \beta _ { 1 } x + \beta _ { 2 } x ^ { 2 }$

question 48

True/False

For the second-order polynomial model $E ( y ) = \beta _ { 0 } + \beta _ { 1 } x + \beta _ { 2 } x ^ { 2 }$ ,the shape of the curve will be determined by the relative sizes of $\beta _ { 1 }$ and $\beta _ { 2 }$ and on their signs.

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