Here are diagnostic plots generated in a lab. In terms of linear models, write comment to every graph and potential problems (if possible). (a) Comments and Potential Problems. Max 6 sentences (b) Comments and Potential Problems. Max 6 sentences
Here are diagnostic plots generated in a lab. In terms of linear models, write comment to every graph and potential problems (if possible).
(a) Comments and Potential Problems. Max 6 sentences
(b) Comments and Potential Problems. Max 6 sentences
Part A
Graph 1
Residual vs Fitted
The linear model seems appropriate because the points are randomly spread.
Graph 2
QQ plot
The points on the QQ plot are approximately making a perfect straight line. There are smaller values in the tail which are expected under standard assumptions.
Graph 3
Scale Location
The plot shows that assumption of equal variance is satisfied as the red line is approximately horizontal and the points are randomly spread.
Graph 4
Residual vs Leverage
All the points are within the cook’s distance red line, so, there is no influential point in the data.
Step by step
Solved in 2 steps
