Suppose you have a residuals plot that shows a funnel shape for the residuals. Which assumption of linear regression is being violated?1 pointthe linearity assumptionthe independence assumptionboth the linearity and the independence assumptionsthe equal variance assumptionboth the linearity and the equal variance assumptions
Question
Suppose you have a residuals plot that shows a funnel shape for the residuals. Which assumption of linear regression is being violated?1 pointthe linearity assumptionthe independence assumptionboth the linearity and the independence assumptionsthe equal variance assumptionboth the linearity and the equal variance assumptions
Solution
The funnel shape in a residuals plot indicates a violation of the equal variance assumption, also known as homoscedasticity. This assumption states that the variance of errors is constant across all levels of the independent variables. When this assumption is violated, it is referred to as heteroscedasticity, which is what the funnel shape in your residuals plot is indicating.
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