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Gen Bus 307 exam 2 Questions And Answers

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Gen Bus 307 exam 2 Questions And Answers quadratic regression model - ANS-Yi=B0 + B1X1 + B2X1^2 Fstat - ANS-MSR/MSE if greater than critical value, reject null MSR - ANS-SSR/d.f. MSE - ANS-SSE/d.f. Testing Quadratic Effect - ANS-Ho: B2 = 0 (no improvement) H1: B2 not equal to 0 (improvement)...

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  • August 13, 2024
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  • Gen Bus 307
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Gen Bus 307 exam 2 Questions And Answers
quadratic regression model - ANS-✔✔Yi=B0 + B1X1 + B2X1^2



Fstat - ANS-✔✔MSR/MSE

if greater than critical value, reject null



MSR - ANS-✔✔SSR/d.f.



MSE - ANS-✔✔SSE/d.f.



Testing Quadratic Effect - ANS-✔✔Ho: B2 = 0 (no improvement)

H1: B2 not equal to 0 (improvement)



adjusted R^2 formula - ANS-✔✔1 - ( (1-r^2) * (n-1)/(n-k-1) )



square root transformation - ANS-✔✔used to overcome violations of equal variance assumption as well
as to transform a model whose form is not linear into a linear model



square root regression - ANS-✔✔Yi = B0 + B1*(X1)^(1/2)



Collinearity - ANS-✔✔refers to situations in which two or more of the independent variables are highly
correlated with one another



possible consequences of collinearity - ANS-✔✔The signs of coefficients do not make sense based on
logic

It will inflate the standard errors of the estimated coefficients

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