QUESTION 28 2.326 poin A residual plot for a regression model is shown below. Wh

Question

QUESTION 28 2.326 poin A residual plot for a regression model is shown below. Which of the following statements is supported by the residual plot alone? Versus Fits (response is y 150 100 50 -50 100 600 650 700 750 800 850 Fitted Vaue The variance of the error terms e, does not appear to be the same for all values of X-xi The mean values of y for all X x do not fall on a straight line. In other words, the scatterplot of Yand X would show a non-linear relationship. O The variance of the error terms , appears to be the same for all values of The distribution of the error terms is not a normal distribution for all values of The assumption of a vertical relationship between X and the mean of Y is not

Explanation / Answer

Here the residual plot exhibits a funneling shape. It indicates

that the variance of the residuals does not appear to be

constant for all values of X = xj. In this case it keeps on

increasing. Hence, the 1st Option is the correct choice. (Ans).

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