Sökning: "Sample Selection"
Visar resultat 1 - 5 av 205 avhandlingar innehållade orden Sample Selection.
Sammanfattning : This thesis consists of four papers, all of which are concerned with the validation of selection to higher education. In paper [I] student performance was observed for a period of three years with a sample of three different admission groups. LÄS MER
Sammanfattning : Sampling is a core stage in every survey. A sampling design carefully elaborated may imply not only a more accurate estimation of the parameters of interest, but also a reduction in the required sample size in a study. In this thesis we consider two particular but connected subjects. LÄS MER
Sammanfattning : This thesis deals with random-size subset selection and ranking procedures• • • )|(derived through likelihood ratios, mainly in terms of the P -approach.Let IT , . .. LÄS MER
Sammanfattning : This thesis makes contributions to the statistical research field of causal inference in observational studies. The results obtained are directly applicable in many scientific fields where effects of treatments are investigated and yet controlled experiments are difficult or impossible to implement. LÄS MER
5. Disentangling small genetic differences in large Atlantic herring populations: comparing genetic markers and statistical power
Sammanfattning : Genes are the foundation of evolution and biodiversity. The genetic structure of natural populations needs to be understood to maintain exploited resources rationally. This thesis focuses on genetic variability and methods to determine spatial and temporal genetic heterogeneities. LÄS MER