Results 31 to 40 of about 199,171 (299)

Multiple Imputation of Missing Data in Educational Production Functions

open access: yesComputation, 2022
Educational production functions rely mostly on longitudinal data that almost always exhibit missing data. This paper contributes to a number of avenues in the literature on the economics of education and applied statistics by reviewing the theoretical ...
Amira Elasra
doaj   +1 more source

Performance of clustering procedures for grouping germplasms based on mixture data with missing observations

open access: yesThe Indian Journal of Agricultural Sciences, 2023
Occurrence of missing observations in mixture of qualitative and quantitative trait data is a common feature in breeding experiments. However, it becomes difficult to cluster the germplasms in presence of missing data.
RUPAM KUMAR SARKAR   +3 more
doaj   +1 more source

The Optimal Machine Learning-Based Missing Data Imputation for the Cox Proportional Hazard Model

open access: yesFrontiers in Public Health, 2021
An adequate imputation of missing data would significantly preserve the statistical power and avoid erroneous conclusions. In the era of big data, machine learning is a great tool to infer the missing values.
Chao-Yu Guo   +4 more
doaj   +1 more source

Comparison of regression imputation methods of baseline covariates that predict survival outcomes

open access: yesJournal of Clinical and Translational Science, 2021
Introduction: Missing data are inevitable in medical research and appropriate handling of missing data is critical for statistical estimation and making inferences.
Nicole Solomon   +2 more
doaj   +1 more source

Multiple Imputation to Balance Unbalanced Designs for Two-Way Analysis of Variance

open access: yesMethodology, 2021
A balanced ANOVA design provides an unambiguous interpretation of the F-tests, and has more power than an unbalanced design. In earlier literature, multiple imputation was proposed to create balance in unbalanced designs, as an alternative to Type-III ...
Joost R. van Ginkel   +1 more
doaj   +1 more source

A New Statistic to Evaluate Imputation Reliability

open access: yesPLoS ONE, 2010
As the amount of data from genome wide association studies grows dramatically, many interesting scientific questions require imputation to combine or expand datasets. However, there are two situations for which imputation has been problematic: (1) polymorphisms with low minor allele frequency (MAF), and (2) datasets where subjects are genotyped on ...
Lin, Peng   +11 more
openaire   +4 more sources

Evaluation and application of summary statistic imputation to discover new height-associated loci.

open access: yesPLoS Genetics, 2018
As most of the heritability of complex traits is attributed to common and low frequency genetic variants, imputing them by combining genotyping chips and large sequenced reference panels is the most cost-effective approach to discover the genetic basis ...
Sina Rüeger   +2 more
doaj   +1 more source

Transposable regularized covariance models with an application to missing data imputation [PDF]

open access: yes, 2010
Missing data estimation is an important challenge with high-dimensional data arranged in the form of a matrix. Typically this data matrix is transposable, meaning that either the rows, columns or both can be treated as features.
Allen, Genevera I., Tibshirani, Robert
core   +1 more source

Quality Assessment of Imputations in Administrative Data [PDF]

open access: yes, 2015
This article contributes a framework for the quality assessment of imputations within a broader structure to evaluate the quality of register-based data.
Astleithner, Franz   +5 more
core   +1 more source

A Comparative Study of Various Methods for Handling Missing Data in UNSODA

open access: yesAgriculture, 2021
UNSODA, a free international soil database, is very popular and has been used in many fields. However, missing soil property data have limited the utility of this dataset, especially for data-driven models. Here, three machine learning-based methods, i.e.
Yingpeng Fu, Hongjian Liao, Longlong Lv
doaj   +1 more source

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