Imputating Missing Values in Diary Records of Sun-exposure Study
نویسندگان
چکیده
In a sun-exposure study, questionnaires concerning sunhabits were collected from 195 subjects. This paper focuses on the general problem of missing data values, which occurs when some, or even all of the questions have not been answered in a questionnaire. Here, only missing values of low concentration are investigated. We consider and compare two di erent models for imputating missing values: the Gaussian model and the non-parametric K-Nearest Neighbor model.
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تاریخ انتشار 2001