NO.PZ2022022101000011
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。
分类可以是监督和非监督 kmeans是非监督 另一种我记得是knn?这个是监督的吗?