Search for dissertations about: "quantile"

Showing result 1 - 5 of 56 swedish dissertations containing the word quantile.

  2. 1. Contributions to Quantile Estimation

    Author : Erik Brodin; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bootstrap; Cross validation; Extreme value theory; Generalized Pareto distribution; Kernel estimator; L-estimator; Non-parametric estimation; Order statistic; Perturbed Generlized Pareto distribution; Quantile estimation; Regular variation; Second order regular variation; Kernel estimator;

    Abstract : .... READ MORE

  4. 2. Nonlinear Quantile Regression for Longitudinal Data

    Author : Andreas Karlsson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; bootstrap; dependent errors; median regression; Monte Carlo simulation; panel data; repeated measures; Statistics; Statistik; Biostatistics; Biostatistik;

    Abstract : The overall objective of the two papers in this thesis is to examine the properties of the weighted nonlinear quantile regression estimator for the analysis of longitudinal data. To this end, the question of which weights to be used, the bias of the estimator and the possibility to calculate confidence intervals has to be examined. READ MORE

  5. 3. Scientific methods for integrating expert knowledge in Bayesian models

    Author : Dmytro Perepolkin; BECC: Biodiversity and Ecosystem services in a Changing Climate; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Bayesian inference; Expert judgement; Quantile-parameterized distributions; Quantile functions;

    Abstract : Generating scientific advice to environmental management involves assessments with complex models, sparse data, and challenging empirical experiments, necessitating the integration of expert judgment with data into scientific models. To integrate expert judgement, assessors might elicit judgement by experts as quantiles, find a probability distribution that matches the quantiles, and add this information to the model. READ MORE

  6. 4. Estimation and Inference for Quantile Regression of Longitudinal Data : With Applications in Biostatistics

    Author : Andreas Karlsson; Johan Lyhagen; Ulf Olsson; Kenneth Carling; Uppsala universitet; []
    Keywords : Statistics; Bias correction; Bootstrap; Dependent errors; Hypothesis testing; Nonlinear model; Simulation study; Statistik;

    Abstract : This thesis consists of four papers dealing with estimation and inference for quantile regression of longitudinal data, with an emphasis on nonlinear models.The first paper extends the idea of quantile regression estimation from the case of cross-sectional data with independent errors to the case of linear or nonlinear longitudinal data with dependent errors, using a weighted estimator. READ MORE

  7. 5. Regression Analysis of Censored Data with Applications in Perimetry

    Author : Anna Lindgren; Matematisk statistik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; censored covariate; L_1 minimization; right-censoring; Quantile regression;

    Abstract : This thesis treats regression analysis when either the dependent or the independent variable is censored. We deal with quantile regression when the dependent variable is censored. READ MORE