The bar graph shows the differences among politicalidentification groups on the Implicit

Chapter 0, Problem 92

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The bar graph shows the differences among politicalidentification groups on the Implicit Association Test thatmeasure levels of racial prejudice. Higher scores indicatestronger bias.a. The data can be described by the following polynomialmodel of degree 3:S = -0.02x3 + 0.4x2 + 1.2x + 22+ (-0.01x3 - 0.2x2 + 1.1x + 2). In this polynomial model, S represents the score on theImplicit Association Test for political identification group x.Simplify the model.b. Use the simplified form of the model from part (a) to findthe score on the Implicit Association Test for the slightlyconservative political identification group. Does the modelunderestimate or overestimate the score displayed by thebar graph? By how much?

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