Sökning: "contributions"

Visar resultat 1 - 5 av 2431 avhandlingar innehållade ordet contributions.

1. 1. Partiality and Choice : Foundational Contributions

   Författare :Jesper Carlström; Per Martin-Löf; Gilles Dowek; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MATHEMATICS; MATEMATIK;

   Sammanfattning : The subject of the thesis is foundational aspects of partial functions (Papers 1, 2 & 4) and some choice principles (Papers 3 & 4) in the context of constructive mathematics.Paper 1 studies the inversion functions of commutative rings. The foundational problem of having them only partially defined is overcome by extending them to total functions. LÄS MER

3. 2. Nonparametric statistical inference about location : some contributions

   Författare :Olivier Guilbaud; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistik;

   Sammanfattning : .... LÄS MER

4. 3. Quality Issues in Interview Surveys : Some Contributions

   Författare :Lilli Japec; Daniel Thorburn; Joop Hox; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Interviewer cognitive process; interviewer burden; nonresponse bias; fieldwork; call attempts; interviewer interest; European Social Survey; Labour Force Survey; interviewer attitudes; interviewer strategies; interviewer satisficing; Statistics; Statistik;

   Sammanfattning : In Paper I, I give a brief overview of the “state of the art” in methodological research related to interview surveys and I discuss some implications for survey practices. I study the literature on participation strategies, interviewer effects that can occur during the interview, methods for quality assurance and interviewer training. LÄS MER

5. 4. Estimating Interviewer Effects in Sample Surveys : Some Contributions

   Författare :Peter Lundquist; Stig Danielsson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Response variance; survey nonsampling error; interviewer effects; interpenetration; power; Statistics; Statistik;

   Sammanfattning : This thesis focuses on measurement errors that could be ascribed to the interviewers. To study interviewer variability a measurement error model is formulated which makes a clear distinction between three sources of randomness: the sample selection, interviewer assignment, and interviewing. LÄS MER

7. 5. Control of the coding operation in statistical investigations : some contributions

   Författare :Lars Lyberg; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : .... LÄS MER