To assess the linear model based on the residuals provided (2.6, 9.3, -5.489, and -6.59), we need to consider what residuals indicate about the model's fit.
- A residual close to 0 suggests that the model's estimate is very close to the actual value, indicating a good fit.
- Positive residuals indicate that the model's estimate is lower than the actual value, while negative residuals indicate that the model's estimate is higher than the actual value.
- The magnitude of the residuals also matters; larger absolute values mean a larger difference between the predicted and actual values.
Based on the information given, the residual values include a significant positive value (9.3) and other relatively smaller values. The presence of a large residual like 9.3 suggests that there is at least one point where the model's estimate is quite far from the actual value, indicating a potential issue with the fit of the linear model.
Considering this, the most valid conclusion Jade can make is:
The linear model does not accurately represent the data since the residual 9.3 means that the actual point is far from the estimate.