Essays about: "statistics inference"

Showing result 21 - 25 of 47 essays containing the words statistics inference.

  1. 21. Variable Selection for Estimating Optimal Sequential Treatment Decisions Using Bayesian Networks

    University essay from Lunds universitet/Statistiska institutionen

    Author : Joel Persson; [2020]
    Keywords : decision theory; causal inference; variable selection; graphical models; causal discovery; dynamic treatment regimes; dynamic programming; reinforcement learning; observational study; Mathematics and Statistics;

    Abstract : We propose a variable selection method for estimating decision rules of optimal sequential treatment assignments when the decision-relevant variables are unknown. Standard variable selection methods are insufficient in this setting since they choose covariates that are predictive of the outcome, not those that interact with the treatment on the outcome and are therefore relevant for decision-making. READ MORE

  3. 22. Statistical Inference for Traffic Safety Analysis Using the Generalized Pareto Distribution

    University essay from Lunds universitet/Matematisk statistik

    Author : Emilsson Sara; Filip Vestin; [2020]
    Keywords : Extreme value theory; traffic safety analysis; surrogate measure of safety; maximum likelihood; delta method; profile likelihood; modified profile likelihood.; Mathematics and Statistics;

    Abstract : This thesis investigates the possibility of computing interval estimates for metrics that pertain to traffic safety based on surrogate measures of safety. A probabilistic model of the (near) crash count is defined using the generalized Pareto distribution and three different methods for calculating confidence intervals for the corresponding intensity parameter are proposed. READ MORE

  4. 23. Counterfactual Prediction Methods for Causal Inference in Observational Studies with Continuous Treatments

    University essay from Lunds universitet/Statistiska institutionen

    Author : Joel Persson; [2019]
    Keywords : Causal Inference; Observational Study; Treatment Effects; Continuous Treatments; Dose-Response Function; Optimization; Mathematics and Statistics;

    Abstract : We develop methods for estimation, inference and optimization of causal effects from observational data with continuous treatments. We present a counterfactual prediction method based on the potential outcomes framework that estimates the expected value of a potential outcome given a treatment level and confounders. READ MORE

  5. 24. An application of Bayesian Hidden Markov Models to explore traffic flow conditions in an urban area

    University essay from Uppsala universitet/Statistiska institutionen

    Author : Lovisa Andersson; [2019]
    Keywords : Bayesian statistics; hidden states; Markov chain; traffic flow modeling; filtering; smoothing; most probable state sequence; MCMC; Hamiltonian Monte Carlo; No-U-Turn sampler;

    Abstract : This study employs Bayesian Hidden Markov Models as method to explore vehicle traffic flow conditions in an urban area in Stockholm, based on sensor data from separate road positions. Inter-arrival times are used as the observed sequences. READ MORE

  6. 25. An inquiry into the efficacy ofconvolutional neural networks in low-resolution video feeds for object detection

    University essay from KTH/Matematisk statistik

    Author : Mirza Okanovic; [2019]
    Keywords : Neural networks; statistics; applied mathematics; person detection; CNN; Neurala nätverk; statistik; tillämpad matematik; person detektion; CNN;

    Abstract : In this thesis, various famous models have been investigated and compared to a custom model for people detection in low resolution video feeds. YOLOv3 and SSD in particular are famous models which have, at their time, produced state of the art results on competitions such as ImageNet and COCO. READ MORE