Worksheet on Correlation and Regression
Residual = observed y- predicted y = = 2.7 – 3.04 = -0.34 kg. The residual is negative because the data point fell below the line. A residual plot is a scatterplot of the regression residuals against the explanatory variable (or equivalently, against the predicted y-values). Residual plots help us assess how well a regression line fits the data. ................
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