1. You conduct a regression of the squared residuals against the dummy variables X1, X2, and X3 and find that for the squared residuals regression:

	Multiple R	0.4145
	R Square	0.1718
	Adjusted R Square	0.1600
	SEE	92.3760

1. Conduct a test at the = .05 level to see if conditional heteroskedasticity is present
2. In view of your answer for a), what needs to be done?