A residual plot for the linear model found in part (i) is shown below. Residuals 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 Hours (vii) Circle the two points on the residual plot representing the scores which are much higher than the score predicted by the linear model. (viii) According to the residual plot, is a linear model appropriate for this data set? Explain.

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