2106. In assumptions testing, violation of constant variance is called

✅ The correct answer is A.
In assumptions testing, violation of constant variance is called heteroscedasticity. Heteroscedasticity means unequal scatter. In regression analysis, we talk about heteroscedasticity in the context of the residuals or error term. Specifically, heteroscedasticity is a systematic change in the spread of the residuals over the range of measured values.