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Nearest Neighbor Methods for the Imputation of Missing Values in Low and High-Dimensional Data

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Nearest Neighbor Methods for the Imputation of Missing Values in Low and High-Dimensional Data (English shop)

Shahla Faisal (Author)

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ISBN-13 (Hard Copy) 9783736997417
ISBN-13 (eBook) 9783736987418
Language English
Page Number 218
Lamination of Cover glossy
Edition 1.
Publication Place Göttingen
Place of Dissertation LMU München
Publication Date 2018-02-27
General Categorization Dissertation
Departments Statistics and operations research, business mathematics
Keywords Missing values, Nearest neighbors, Multiple imputation, High-dimensional data, Mixed-type data, Sequential imputation
Description

Nowadays, due to the advancement and significantly rapid growth in the technology, the collection of high-dimensional data is no longer a tedious task. Regardless of considerable advances in technology over the last few decades, the analysis of high-dimensional data faces new challenges concerning interpretation and integration. One of the major problems in high-dimensional data is the occurrence of missing values. The problem is in particular hard to handle when the distributional forms of the variables are different or the variables are measured on different measurement scales (e.g. binary, multi-categorical, continuous, etc.). Whatever the reason, missing data may occur in all areas of applied research.

The inadequate handling of missing values may lead to biased results and incorrect inference. The standard statistical techniques for analyzing the data require complete cases without any missing observations. The deletion of the cases with missing information to obtain complete data will not only cause the loss of important information but can also affect inferences. In this dissertation, different imputation techniques using nearest neighbors are developed to address the missing data issues in high-dimensional as well as low dimensional data structures.