Sökning: "Missingness"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet Missingness.

  1. 1. Chasing Shadows : An Anthropological Expedition of the Hunt for Olle Högbom

    Kandidat-uppsats, Uppsala universitet/Institutionen för kulturantropologi och etnologi

    Författare :Viktor Andersson; [2024]
    Nyckelord :Disappearance; Missingness; Hauntology; Ruinology; Simulacra; Liminality; Ethnography; Anthropology;

    Sammanfattning : 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

  3. 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 teknik

    Författare :Charles Edward Okon; Randi Kalanika Assalaarachchi; [2023]
    Nyckelord :missing data; proxy response; missingness mechanism; error-in-variable; logistic regression; Monte-Carlo simulation; missing at random; complete case analysis; proxy substitution; multiple imputation; inverse probability treatment weighting;

    Sammanfattning : 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

  4. 3. Inverse probability weighted generalised estimating equations for longitudinal data

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Andrea Mattsson; [2021]
    Nyckelord :weighted generalised estimating equations; inverse probability weighting; longitudinal study; missing data; truncation by death; lung function; FEV1; Mathematics and Statistics;

    Sammanfattning : 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

  5. 4. AI applications on healthcare data

    Kandidat-uppsats, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Oscar Andersson; Tim Andersson; [2021]
    Nyckelord :AI; Machine Learning; Data missingness; healthcare;

    Sammanfattning : 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

  7. 5. Comparison of multiple imputation methods for missing data : A simulation study

    Magister-uppsats, Umeå universitet/Statistik

    Författare :Sjoerd Schelhaas; [2021]
    Nyckelord :;

    Sammanfattning : 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