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Learning Goal
Part of: Represent data on two quantitative variables with scatter plots — 2 of 3 group items
Assess fit by analyzing residuals
Lesson plan for this standard
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Open the lesson plan →HSS.ID.B.6.b
**HSS.ID.B.6.b**: Informally assess the fit of a function by plotting and analyzing residuals.
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HSS.ID.B.6.b: Informally assess the fit of a function by plotting and analyzing residuals.
What you'll learn
- Define a residual as observed minus predicted and compute residuals for data points
- Construct a residual plot (residual versus x) with a reference line at zero
- Interpret a residual plot - random scatter signals a good fit, a pattern signals the wrong model
- Decide, from the residual plot, whether to keep the fitted model or refit with a different function family
Slides
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Slide Video
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Task-sets
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