NO.PZ201512020300000501
问题如下：
1 The machine learning techniques appropriate for executing Step 1 are most likely to be based on:
选项：
A.regression
classification
clustering
解释：
A is correct. The target variable (quarterly return) is continuous, hence this calls for a supervised machine learning based regression model.
B is incorrect, since classification uses categorical or ordinal target variables, while in Step 1 the target variable (quarterly return) is continuous.
C is incorrect, since clustering involves unsupervised machine learning so does not have a target variable.
请问老师classification适用于离散变量，在基础课件的哪里呢？我没找到，辛苦老师帮忙看看，方便我们日后复习
