Sökning: "degree statistics"

Visar resultat 1 - 5 av 144 avhandlingar innehållade orden degree statistics.

1. 1. On Degree Variance in Random Graphs

   Författare :Jan Hagberg; Ove Frank; Tom A.B. Snijders; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Degree Sequences; Uniform Random Graphs; Bernoulli Graphs; Degree Moments; Degree Statistics; Degree Variance; Gamma Approximation; Centrality Testing; Integer Sequences; Statistics; Statistik;

   Sammanfattning : This thesis is concerned with degree moments and degree variance in random graphs. The degree of vertex i in a graph is the number of edges incident to vertex i.In the first paper, degree moments and functions of degree moments are investigated for three random graph models. LÄS MER

3. 2. Estimation of energy need for heating in single-family houses : A dissertation for the technology licentiate´s degree in statistics

   Författare :Karl-Erik Westergren; Högskolan i Gävle; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Energy Signature models; monitoring; energy end-use; heating; climate standardisation; sample design; internet-based; data communication; dual heating systems; varying heat factor; time varying energy parameters; Statistics; Statistik;

   Sammanfattning : .... LÄS MER

4. 3. On the Measurement of Model Fit for Sparse Categorical Data

   Författare :Katrin Kraus; Dag Sörbom; Ghazi Shukur; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; goodness-of-fit; sparseness; model fit; categorical data; fit statistic; sparse contingency table; Statistics; Statistik;

   Sammanfattning : This thesis consists of four papers that deal with several aspects of the measurement of model fit for categorical data. In all papers, special attention is paid to situations with sparse data. LÄS MER

5. 4. Triad count estimation and transitivity testing in graphs and digraphs

   Författare :Martin Karlberg; Tom Snijders; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistics; Statistik; statistik; Statistics;

   Sammanfattning : Triads and transitivity are two concepts within the field of social network analysis that are closely related to each other. We study some estimation and testing problems related to those concepts, using the tools of graph theory; the results obtained could be applied to graphs representing other kinds of data than social relations. LÄS MER

7. 5. Essays on Model Assisted Survey Planning

   Författare :Anders Holmberg; Bengt Rosén; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistics; Statistik; Statistics; Statistik; Statistics; statistik;

   Sammanfattning : The quality of sample survey results is to a large degree dependent on decisions made by survey statisticians at the planning stage. The first paper studies two issues related to the planning stage: (i) the sensitivity of model assumptions concerning the relation between the size measure and a study variable in without replacement probability proportional-to-size sampling (πps sampling), and (ii) properties of practicable sample selection schemes for fixed size πps sampling. LÄS MER