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Copyright © 2003, N. Ahbel Residuals
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Copyright © 2003, N. Ahbel Predicted Actual Actual – Predicted = Error Source: http://www.studyworksonline.com, 8/13/03 “Residual” in statistics is the same as “error” Residual = Actual y – Predicted y
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Copyright © 2003, N. Ahbel Positive residual Source: http://www.studyworksonline.com, 8/13/03 “Residual” in statistics is the same as “error” Residual = Actual y – Predicted y
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Copyright © 2003, N. Ahbel Negative residual Source: http://www.studyworksonline.com, 8/13/03 “Residual” in statistics is the same as “error” Residual = Actual y – Predicted y
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Copyright © 2003, N. Ahbel Residual plot
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Copyright © 2003, N. Ahbel 1-1 correspondence between every point on the scatterplot and the corresponding point on the residual plot
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Copyright © 2003, N. Ahbel Clear PatternNo Pattern Residuals Inappropriate Model Appropriate Model Concave up or down Increasing or decreasing Too high or low
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Copyright © 2003, N. Ahbel Pattern – Clear concave down pattern Conclusion - Not an appropriate model
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Copyright © 2003, N. Ahbel Pattern – No clear pattern Conclusion - Appropriate
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Copyright © 2003, N. Ahbel Pattern – No clear pattern Conclusion - appropriate model
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Copyright © 2003, N. Ahbel Residuals
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