Sökning: "regression test"

Visar resultat 1 - 5 av 401 avhandlingar innehållade orden regression test.

  1. 1. Identifying Influential Observations in Nonlinear Regression : a focus on parameter estimates and the score test

    Författare :Karin Stål; Tatjana von Rosen; Sune Karlsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Added parameter plot; differentiation approach; influential observation; nonlinear regression; score test; Statistics; statistik;

    Sammanfattning : This thesis contributes to influence analysis in nonlinear regression and in particular the detection of influential observations. The focus is on a regression model with a known mean function, which is nonlinear in its parameters and where the function is chosen according to the knowledge about the process generating the data. LÄS MER

  3. 2. Statistical Properties of Preliminary Test Estimators

    Författare :Nicklas Korsell; Rolf Larsson; Johan Lyhagen; Tore Schweder; Uppsala universitet; []
    Nyckelord :Statistics; Linear regression; Preliminary test; Model selection; Test for homoscedasticity; Variance components; Truncated estimators; Inertia of matrices; Statistik;

    Sammanfattning : This thesis investigates the statistical properties of preliminary test estimators of linear models with normally distributed errors. Specifically, we derive exact expressions for the mean, variance and quadratic risk (i.e. the Mean Square Error) of estimators whose form are determined by the outcome of a statistical test. LÄS MER

  4. 3. Cervical dysplasia and cervical cancer in pregnancy: diagnosis and outcome

    Författare :Cecilia Kärrberg; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cervical dysplasia; cervical cancer; pregnancy; colposcopic scoring system; regression; persistence; progression; HPV DNA test; HPV mRNA E6 E7 test; p16INK4a;

    Sammanfattning : ABSTRACT:Cervical cancer is one of the most common types of cancer that is diagnosed during pregnancy. The primary aim in investigation of atypical cervical cytology during pregnancy is to exclude cancer so that further treatment of the lesion can be postponed until after delivery. LÄS MER

  5. 4. Progression and Regression. Aspects of Advanced Swedish Students' Competence in English Grammar

    Författare :Monica Karlsson; Engelska; []
    Nyckelord :HUMANIORA; HUMANITIES; Engelska språk och litteratur ; English language and literature; error gravity; proper noun; identification frame; genericness; the zero article; ‘idiomatic’ prepositional use; ‘systematic’ prepositional use; ‘basic’ prepositional use; non-contiguous subject-verb construction; contiguous subject-verb construction; subject-verb concord; fossilisation; restructuring of information; automatisation; interlanguage; cognitive second language acquisition theory; U-curve development; regression; progression; developmental pattern; relative frequency; error score; potential error; developmental continuum; advanced learner; Grammar; semantics; semiotics; syntax; Grammatik; semantik; semiotik; Applied linguistics; foreign languages teaching; sociolinguistics; Tillämpad lingvistik; undervisning i främmande språk; sociolingvistik;

    Sammanfattning : This thesis investigates advanced Swedish students’ development of three grammatical phenomena: subject-verb concord, prepositions and article use in compositions and translations. In order to describe the students’ development of these categories, actual errors are related to potential errors forming so called ‘error scores’. LÄS MER

  7. 5. Understanding and improving regression testing practice

    Författare :Nasir Mehmood Minhas; Jürgen Börstler; Kai Petersen; Miroslaw Staron; Blekinge Tekniska Högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Regression testing; Goals; GQM; Replication; Checklists; Programvaruteknik; Software Engineering;

    Sammanfattning : BackgroundRegression testing is a complex and challenging activity and consumes a significant portion of software maintenance costs. Researchers are proposing various techniques to deal with the cost and complexity of regression testing. Yet, practitioners face various challenges when planning and executing regression testing. LÄS MER