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What is the residual and how is it used in calculating the least square regression line? The residual is also used to quantify the unexplained

  • What is the residual and how is it used in calculating the least square regression line?
  • The residual is also used to quantify the unexplained variation.How is the unexplained variation related to R-squared from the SPSS output?If R-squared were 40%, what is the interpretation of the explained and unexplained variation?
  • How is the residual used in the ANOVA analysis for assessing the significance of the model?

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