Search for dissertations about: "chi-square distribution"

Showing result 1 - 5 of 7 swedish dissertations containing the words chi-square distribution.

  2. 1. Mimic: A Microscopic Simulation Model for Rural Road Traffic

    Author : Stig O. Simonsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; computer model; time headway; log normal distribution; Chi-Square test; gap-acceptance; rural road network; car-following; traffic simulation model; alignment; sight distance; Kolmogorov-Smirnoff test; software system; statistics;

    Abstract : The purpose of this dissertation is to outline the theoretical basis of a road traffic simulation model, named Mimic, that constitutes the key elements of a system for estimating road user effects and environmental impacts. The simulation model suggested is a microscopic road traffic simulation model and it is structured to be used for networks of rural roads. READ MORE

  4. 2. Equity in welfare evaluations : the rationale for and effects of distributional weighting

    Author : Gunnel Bångman; Lars Hultkrantz; Fredrik Carlsson; Örebro universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; weighted cost-benefit analysis; equity; distributional weights; social welfare; income distribution; risk aversion; social marginal value of income; altruism; paternalism; marginal utility of income; social inequality aversion; stated preferences; Economics; Nationalekonomi; Economics; Nationalekonomi;

    Abstract : This thesis addresses the issue of weighted cost-benefit analysis (WCBA). WCBA is a welfare evaluation model where income distribution effects are valued by distributional weighting. The method was developed already in the 1970s. The interest in and applications of this method have increased in the past decade, e. READ MORE

  5. 3. Generalised linear models with clustered data

    Author : Henrik Holmberg; Göran Broström; Kenneth Carling; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Statistics; Statistik; Statistics; statistik;

    Abstract : In situations where a large data set is partitioned into many relativelysmall clusters, and where the members within a cluster have some common unmeasured characteristics, the number of parameters requiring estimation tends to increase with sample size if a fixed effects model is applied. This fact causes the assumptions underlying asymptotic results to be violated. READ MORE

  6. 4. Latent variable models for longitudinal twin data

    Author : Annica Dominicus; Juni Palmgren; Nancy L. Pedersen; Michael G. Kenward; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Latent variable models; twin models; variance components; change point models; non-ignorable nonresponse; likelihood ratio tests; Mathematical statistics; Matematisk statistik;

    Abstract : Longitudinal twin data provide important information for exploring sources of variation in human traits. In statistical models for twin data, unobserved genetic and environmental factors influencing the trait are represented by latent variables. In this way, trait variation can be decomposed into genetic and environmental components. READ MORE

  7. 5. Injuries among children and young adults in Uganda : epidemiology and prevention

    Author : Milton Mutto; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Injuries are a major morbidity and mortality cause among children and young adults worldwide. Previous Ugandan studies were limited in scope and biased towards severe adulthood injuries in referral care. READ MORE