フリー問題

問題文

A team fits a clustering model with a chosen number of groups and needs a number that tells whether the groups are tight and well separated. What does the platform offer?

選択肢

1. An evaluator for clustering returns a score built from the distances inside the groups and between the groups.
2. An evaluator for clustering returns a score built from the labels that the team supplies for a small sample of the rows.
3. The evaluator for regression returns a score that treats the distances to the centers as errors.
4. The evaluator for multiple classes returns a score after the group numbers are treated as the labels that the rows carry.