Looking at the following residual plot, what can you conclude Residuals vs Fitted o10 o 08 1430 590 0.0 0.5 1.0 1.5 2.0 2.5 3.0 The residual standard deviation is not constant for all values of X O There is no linear regression assumption violation A quadratic effect seems to be present Residuals -8 -4 9 0 2 4

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