如题,SAS中什么是区间型变量什么是列名型变量,并且测量水平是什么意思呢?谢谢!
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[学习分享] 请问大神什么是区间型变量什么是列名型变量? |
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回帖推荐● A categorical variable is one for which the measurement scale consists of a set of categories.
● Categorical variables for which levels (categories) do not have a natural ordering are called nominal. 列名型变量
● Categorical variables that do have a natural ordering of their levels are called ordinal. 序列型变量
● An interval variable is one that has numerical distances between any two ...
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