In the Quadratic Regression Model Y = β₀ + β₁X₁

question 35

Multiple Choice

In the quadratic regression model y = β₀ + β₁X₁ + β₂X₁² + ε, if the term β₂ is ________ zero, then the parabola opens ________.

• A) less than, upward
• B) greater than, upward
• C) greater than, either upward or downward
• D) less than, either upward or downward
• E) equal to, downward

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