请判断一下对错，简要说明一下理由

Heteroskedasticity arises when the residuals are correlated over time

Wrong.

Heteroskedasticity refers to the circumstance in which the variability of a variable is unequal across the range of values of a second variable that predicts it, not across time.

When residuals are correlated over time, it breaks the independence assumption.

随着时间变化，残差之间是相关的，此时异方差性出现？？？不会翻译。。。

maybe correct.
随着时间的变化，如果方差变化，Heteroskedasticity 会出现。