Assumptions

In the Assumption tab several tests can be conducted to check whether the assumptions for the parametric tests are met. One possibility is to create a diagnostic plots as shown below. The results indicate that the assumptions for parametric models are reasonably satisfied.

• Residuals are approximately normally distributed.
• Variance is relatively stable across fitted values.
• No extreme outliers or influential observations are present.

Therefore, a parametric model is appropriate for this analysis.