Sökning: "causal models"
Visar resultat 16 - 20 av 162 avhandlingar innehållade orden causal models.
16. Statistical models of TF/DNA interaction
Sammanfattning : Gene expression is regulated in response to metabolic necessities and environmental changes throughout the life of a cell. A major part of this regulation is governed at the level of transcription, deciding whether messengers to specific genes are produced or not. LÄS MER
17. Attrition in Studies of Cognitive Aging
Sammanfattning : Longitudinal studies of cognition are preferred to cross-sectional stud- ies, since they offer a direct assessment of age-related cognitive change (within-person change). Statistical methods for analyzing age-related change are widely available. LÄS MER
18. Uncertainty intervals and sensitivity analysis for missing data
Sammanfattning : In this thesis we develop methods for dealing with missing data in a univariate response variable when estimating regression parameters. Missing outcome data is a problem in a number of applications, one of which is follow-up studies. LÄS MER
19. Causal links of past climate change in Coupled Model Intercomparison Project Phase 5 climate models
Sammanfattning : The climate system is influenced by various external forcings (e.g. volcanic forcing, solar forcing and change of greenhouse gas concentrations) and its own internal climate variability. LÄS MER
20. Towards a flexible statistical modelling by latent factors for evaluation of simulated responses to climate forcings
Sammanfattning : In this thesis, using the principles of confirmatory factor analysis (CFA) and the cause-effect concept associated with structural equation modelling (SEM), a new flexible statistical framework for evaluation of climate model simulations against observational data is suggested. The design of the framework also makes it possible to investigate the magnitude of the influence of different forcings on the temperature as well as to investigate a general causal latent structure of temperature data. LÄS MER