- scedasticity
- skedasticity
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方差性的英文
例句与用法
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- If the assumption fails , we say the model exhibits heteroskedasticity
如果这个假定不成立，我们说模型存在异方差性。 - " for methods of analyzing economic time series with time - varying volatility arch
所发明的“自动递减条件下的异方差性” - The model which has such kind of property is referred to as heteroscedastic regression model
扰动项具有异方差性的模型称为异方差模型。 - One of the important hypotheses of classical linear regression model is that the random disturbances have equal variance
经典线性回归模型的一个重要假设就是回归方程的随机扰动项u _ i ，具有相同的方差，也称同方差性。 - However in most economic phenomena , this kind of hypothesis is not necessary true . sometimes the disturbances vary with the observations . this is called heteroscedasticity
但在大多数经济现象中，这种假设不一定成立，有时扰动项u _ i的方差随观察值的不同而变化，这就是异方差性。