Does Homoscedasticity applies only for linear regression models? In statistics, a sequence of random variables is homoscedastic if all its random variables have the same finite variance. This is also known as homogeneity of variance (Wikipedia).
Is this assumption only for linear regression models?
If not, is there any relative method is available to check for non-linear models?
It also applies to other methods, i.e. not just linear regression. For example, ANOVA and T-test also depend on homogeneity of variance.
One method to check the homogeneity of variance, compatible with the one-way ANOVA, is the Barlett's test.