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| Stepp is concerned about the validity of Hays’ regression analysis and asks Hays if he can test for the presence of heteroskedasticity. Hays complies with Stepp’s request, and detects the presence of unconditional heteroskedasticity. Which of the following statements regarding heteroskedasticity is most correct? A. Heteroskedasticity can be detected either by examining scatter plots of the residual or by using the Durbin-Watson test. B. Unconditional heteroskedasticity usually causes no major problems with the regression. C. Unconditional heteroskedasticity does create significant problems for statistical inference. |