Sökning: "stickprov"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet stickprov.

1. 1. Aspects of Moment Testing when p>n

   Författare :Zhizheng Wang; Thomas Holgersson; Miguel Fonseca; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; High-dimensional data; Asymptotic distribution; Kolmogorov condition; Monte Carlo simulation; Hypothesis testing; Skewness and kurtosis; Statistics Econometrics; Statistik;

   Sammanfattning : This thesis concerns the problem of statistical hypothesis testing for mean vector as well as testing for non-normality in a high-dimensional setting which is called the Kolmogorov condition. Since we consider mainly the first and the second moment in testing for mean vector and we utilize the third and the fourth moment in testing for non-normality, this thesis concerns a more general moment testing problem. LÄS MER

3. 2. Essays on Panel Cointegration

   Författare :Joakim Westerlund; Nationalekonomiska institutionen; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Nationalekonomi; ekonometri; ekonomisk teori; ekonomiska system; ekonomisk politik; Cross-Sectional Dependence; Common factor restriction; Feldstein-Horioka Puzzle; Fisher Hypothesis; economic policy; economic theory; economic systems; Economics; econometrics; Structural Break.; Sieve Bootstrap; Information Criteria; Residual-Based Cointegration Test; Panel Cointegration; Monte Carlo Simulation; Model Selection; International R D Spillovers; International Health Care Expenditures;

   Sammanfattning : This thesis develops new techniques for analyzing cointegrated relationships in panel data. The first chapter is introductory while the remaining six contain the main contributions. LÄS MER

4. 3. Uncertainty quantification for time varying quantities in turbulent flows

   Författare :Donnatella Xavier; Philipp Schlatter; Saleh Rezaeiravesh; Ricardo Vinuesa; David Moxey; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; uncertainty; variance estimator; autoregressive models; turbulence; computational fluid dynamics; Teknisk mekanik; Engineering Mechanics;

   Sammanfattning : Quantification of uncertainty in results is crucial in both experiments and simulations of turbulence, yet this practice is notably underutilized. This thesis project delves into statistical tools within the framework of uncertainty quantification to systematically quantify uncertainties that occur in the time varying quantities of turbulence. LÄS MER

5. 4. Strength grading of structural timber and EWP laminations of Norway spruce : Development potentials and industrial applications

   Författare :Jan Oscarsson; Anders Olsson; Marie Johansson; Hans Joachim Blass; SE-351 96 Växjö Videum Science Park SP Technical Research Institute of Sweden SP Wood Technology; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fibre angle; grain angle; knots; laser scanning; machine strength grading; modulus of elasticity; side boards; strain; structural timber; wet gluing; wood; Byggteknik; Civil engineering;

   Sammanfattning : Machine strength grading of structural timber is a sawmill process by which considerable value is added to sawn products. The principle of such grading is that the strength of a timber member is predicted on the basis of a so called indicating property (IP) which, in general, represents an averaged value of the modulus of elasticity (MOE) measured over a board length of about one meter or more. LÄS MER

7. 5. Insomnia Symptoms in Chronic Pain : Clinical presentation, risk and treatment

   Författare :Tobias Wiklund; Elena Dragioti; Steven J. Linton; Björn Gerdle; Péter Alföldi; Bjørn Bjorvatn; Linköpings universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

   Sammanfattning : In recent years, chronic and recurrent pain have gained interest as distinct conditions interacting both with peripheral and central parts of the nervous system as well as with the immune system. The risk of getting affected by abnormal pain modulation i.e. LÄS MER