Identifying outliers and other influential points

Plot measures to identify cases with large outliers, high leverage, or major influence on the fitted model.

  1. Activate the analysis report worksheet.
  2. On the Analyse-it ribbon tab, in the Diagnostics group, click Outliers and Influence.
    The analysis task pane Outliers, Leverage, Influence panel opens.
  3. Optional: To highlight and label cases that are large outliers, have high leverage or major influence on the fitted model, select the Identify influential cases check box.
  4. Optional: To individually plot the Studentized residual, leverage, and Cook's D influence measures by observation number, select the Index plots check box.
  5. Click Recalculate.

Points highlighted in red are deemed to be potentially influential to the fitted model.

Related concepts