简述建立指数时处理缺失值的常用方法。
答:(1)如果数据中缺失值所占的比重不大,可以考虑删除那些含有缺失值的被访者,(2)如果指数有多个指标,可以考虑用已有数据的平均值来代替缺失值:(3)在大样本和指标较多的情况下,还可以用随机方法给缺失值赋值。
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