Assume that you had estimated the following quadratic regression model $\widehat{\text { TestScore }}$ = 607.3 + 3.85 Income - 0.0423 Income². If income increased from 10 to 11 ($10,000 to $11,000), then the predicted effect on testscores would be A)3.85 B)3.85-0.0423 C)Cannot be calculated because the function is non-linear D)2.96

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Quizplus · Accepted Answer

The change in the test score due to an increase in income from 10 to 11 can be calculated by substituting these values into the given quadratic equation and finding the difference. The calculation is as follows: For Income = 11, $\widehat{\text{TestScore}} = 607.3 + 3.85(11) - 0.0423(11)^2$For Income = 10, $\widehat{\text{TestScore}} = 607.3 + 3.85(10) - 0.0423(10)^2$The difference in predicted test scores gives the effect of increasing income from 10 to 11, which is approximately 2.96.

Assume That You Had Estimated the Following Quadratic Regression Model TestScore ^\widehat{\text { TestScore }} TestScore

Assume That You Had Estimated the Following Quadratic Regression Model $\widehat{\text { TestScore }}$