If the plot of the residuals is fan shaped which assumption

If the plot of the residuals is fan shaped, which assumption of regression analysis (if any) is violated?

Select one:

a. Independence of errors

b. Linearity

c. Normality

d. No assumptions are violated

e. Equal error variance (Homoscedasticity)

Solution

e. Equal error variance (Homoscedasticity)

equal variance assumption means that the variance of errors is constant, but fan shaped plot shows that y-values are more scattered towards one direction, i.e, variance is not constant.