另一种监督分类方法是啥来着

问题如下：

Yu wants to design a training set based on wide variety of most relevant characteristics, 500 randomly selected clients will be asked open-ended questionnaire, then Yu will assign those individual sample to 5 different portfolios. If Yu was to use K-means clustering model, the number of clustering groups is:

选项：

A.

500

B.

5

C.

none

D.

Depends on the number of features

解释：

Correct answer: B

因为K均值聚类是将杂乱无章的数据经过聚类之后变得有序，是非监督学习，所以C和D排除了，因为是500个样本分成5个portfolio，所以选择B。