Answers

Here are the answers to the previous questions:

1. Having the optimal number of groups helps to get more compact groups and prevents us from having a large number of outliers.
2. Yes, it is possible. It is more difficult to visualize the potential groups with a chart, but we can use K-means clustering to get the optimal number of groups and then do the classification.
3. These are points that do not have the same behavior as the rest of the groups. It is necessary to do further research on them because it could lead to finding potential fraud or system performance degradation.