Review Conditional pdf Let(Y1,., YN) have joint pdf f(31,.. JN). Let f(3J+1, .. yN)be the marginal pdf of(y+1,……,YN). The conditional pdf of y1,…, Y, given y+1,…, YN is defined by

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Chapter 11 Heteroskedasticity 11.1 White's test for heteroskedasticity For a model with het eroskedasticity