Sökning: "Missingness"
Visar resultat 1 - 5 av 10 uppsatser innehållade ordet Missingness.
1. Chasing Shadows : An Anthropological Expedition of the Hunt for Olle Högbom
Kandidat-uppsats, Uppsala universitet/Institutionen för kulturantropologi och etnologiSammanfattning : This essay explores the mysterious disappearance of Olle Högbom from an anthropological perspective. It uses theories of hauntology, ruinology, and simulacra to examine how Olle's absence continues to affect society. LÄS MER
2. An Empirical Investigation of The Effect of Proxy Response and The Merits of Its Remedial Measures
Magister-uppsats, Högskolan Dalarna/Institutionen för information och teknikSammanfattning : In the event of missing data, substitution of data from proxy sources are usually considered a very useful alternative when available to avoid the problem of missingness. Nonetheless, research has also shown that this approach often induces “response bias”. LÄS MER
3. Inverse probability weighted generalised estimating equations for longitudinal data
Master-uppsats, Lunds universitet/Matematisk statistikSammanfattning : Longitudinal study designs, in which variables of interest are observed at multiple time points in a study population, are frequently used in clinical research. Missing data are common in these types of studies. Moreover, in studies investigating a population where the mortality rate is high, data can be truncated by death. LÄS MER
4. AI applications on healthcare data
Kandidat-uppsats, Högskolan i Halmstad/Akademin för informationsteknologiSammanfattning : The purpose of this research is to get a better understanding of how different machine learning algorithms work with different amounts of data corruption. This is important since data corruption is an overbearing issue within data collection and thus, in extension, any work that relies on the collected data. LÄS MER
5. Comparison of multiple imputation methods for missing data : A simulation study
Magister-uppsats, Umeå universitet/StatistikSammanfattning : Despite a well-designed and controlled study, missing values are consistently present inresearch. It is well established that when disregarding missingness by analyzing completecases only, statistical power is reduced and parameter estimates are biased. LÄS MER