Essays about: "multivariate statistics"

Showing result 16 - 20 of 57 essays containing the words multivariate statistics.

  1. 16. Testing Structure of Covariance Matrix under High-dimensional Regime

    University essay from Linköpings universitet/Statistik och maskininlärning

    Author : Jiawei Wu; [2020]
    Keywords : Covariance matrix; Structure test; High-dimension data; Outliers; Significance level; Power of test; Goodness of fit test;

    Abstract : Statisticians are interested in testing the structure of covariance matrices, especially under the high-dimensional scenario in which the dimensionality of data matrices exceeds the sample size. Many test statistics have been introduced to test whether the covariance matrix is equal to identity structure (), sphericity structure () or diagonal structure (). READ MORE

  3. 17. Clinical Assessment of Disturbed Central Pain Modulation in Orofacial Pain

    University essay from Malmö universitet/Odontologiska fakulteten (OD)

    Author : Erik Öjstedt; Simon Pankalla; [2020]
    Keywords : Central Sensitization; Chronic Pain; Orofacial Pain; Referred Pain; Stress;

    Abstract : Syfte. Studiens syfte var att retrospektivt undersöka vilka kliniska variabler, bedömda under specialistundersökning av orofacial smärta, som kan förutsäga närvaro av en störd central smärtmodulering (DCPM). Material och metod. READ MORE

  4. 18. Multivariate Risk: From Univariate to High-Dimensional Graphical Models

    University essay from Lunds universitet/Statistiska institutionen

    Author : Erik Oldehed; [2020]
    Keywords : Block Maxima; Mean Excess Plot; Tail Risk; Cross-Validation Threshold Selection; Graphical Lasso; Nonparanormal Distribution.; Mathematics and Statistics;

    Abstract : We present a comparison of different univariate and multivariate extreme value risk models. Our focus is on exploring how these can be used to model financial risk. We use simulated as well as real data and compare deterministic and cross-validation threshold selection methods for the GP model to a GEV model. READ MORE

  5. 19. Election Forecasting in a Multiparty System

    University essay from Göteborgs universitet/Institutionen för nationalekonomi med statistik

    Author : Stefan Lindborg; [2019-01-31]
    Keywords : Election forecasting; Polling; Multiparty systems; Dynamic Linear Models; DLM; Kalman filtering; Swedish elections;

    Abstract : This bachelor thesis in statistics covers the subject of election forecasting in a multiparty system, using polling data, that is data collected to measure party support, and dynamic linear models (DLMs) with Kalman filtering. In terms of decision-making the outcome of an election can be thought of as an uncertainty. READ MORE

  6. 20. Modelling user interaction at scale with deep generative methods

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Beatrice Ionascu; [2018]
    Keywords : generative model; deep learning; variational auto-encoder; convolutional neural network; time-series; data reconstruction;

    Abstract : Understanding how users interact with a company's service is essential for data-driven businesses that want to better cater to their users and improve their offering. By using a generative machine learning approach it is possible to model user behaviour and generate new data to simulate or recognize and explain typical usage patterns. READ MORE