Describing Relationships

Describing Relationships

1. Is linear model appropriate or would a non-linear model be more appropriate?

   • Scatter Plot:
     • Shows relationship between two variables
       • Explanatory Variable
       • Response Variable
   • Residuals
     • Residual Plot:
       • Determines whether a linear model is or isn't appropriate.
         • Linear
           • Random distirbution
         • Non-Linear
           • Non-Random Distribution

2. How accurate will our predictions be?

   • R Squared/Coefficient of Correlation
   • Standard Deviation
   • Residuals

3. Are there any unusual features?

   • Outliers: points that do not match the data pattern. These point directly inmpact the regression line of a scatter plot. a.k.a influential points