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Course: Statistics and probability?>?Unit 5
Lesson 5: Assessing the fit in least-squares regression- Residual plots
- Residual plots
- R-squared intuition
- R-squared or coefficient of determination
- Standard deviation of residuals or Root-mean-square error (RMSD)
- Interpreting computer regression data
- Interpreting computer output for regression
- Impact of removing outliers on regression lines
- Effects of influential points
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Effects of influential points
Problem
The scatterplot below displays a set of bivariate data along with its least-squares regression line.
Consider removing the point and calculating a new least-squares regression line.
What effect(s) would removing this point have?