Heteroskedasticity Is a Violation of Which Assumption of the MR $\sigma$

question 13

Multiple Choice

Heteroskedasticity is a violation of which assumption of the MR model?

• A)The values of each x_ik are not random and are not exact linear functions of the other explanatory variables
• B)var(y_i. )= var(e_i)= \(\sigma\)²
• C)E(y_i)= \(\beta\)₁ + \(\beta\)₂x_i2 + \(\beta\)₃x_i3 + …….+ \(\beta\)_kx_ik,⟺E(e_i)= 0
• D)cov(y_i,y_j)= cov(e_i,e_j)= 0; (i≠j)

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