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Kanonische Korrespondenzanalyse
Benutzen Sie die Kanonische Korrespondenzanalyse, (auf Englisch Canonical Correspondence Analysis, oder CCA) um die Analyse einer Kontingenztabelle (typischerweise eine Tabelle mit Zählungen von Spezies an bestimmten Orten) mit quantitativen oder qualitativen gemessenen Variablen an denselben Orten in Verbindung zu bringen. Die Kanonische Korrespondenzanalyse (auf Englisch Canonical Correspondence...
Latent-Class-Klassifizierung
What is Latent Class Analysis? Latent class analysis involves the construction of Latent Classes which are unobserved (latent) subgroups or segments of cases. The latent classes are constructed based on the observed (manifest) responses of the cases on a set of indicator variables. Cases within the same latent class are homogeneous with respect to their responses on these indicators, while cases in...
Parametrische Überlebenskurven
What is Parametric survival curve analysis The Parametric survival curve belongs to the descriptive methods of survival analysis, as does life table analysis. Parametric survival curves allows you to quickly obtain a population survival curve and essential statistics such as the median survival time based on a parametric distribution. The Parametric survival curves is an alternative to Kaplan-Meier...
Zuverlässigkeitsanalyse
What is reliability analysis? Reliability analysis is used in several areas, noticeably in social science. The terminology finds its origin in psychometry. We thus define a test made up of questions. Questions are called elements. Those elements are gathered within homogeneous constructs also called factors, measurement scales, latent variables or concepts. As an illustration, graphical skill might...
Analyse eines Mischungsplan
What is mixture design analysis Description of models The analysis of a mixture design is based on the same principle as linear regression. The major difference comes from the model that is used. Several models are available. By default, XLSTAT associates a reduced model (Simplified Canonical Model) to centroïd simplexes. However, it is possible to change the model if the number of degrees of freedom...
Varianzanalyse mit wiederholten Messungen (ANOVA)
Principles of Repeated measures Analysis of Variance The principle of repeated measures ANOVA is simple. For each measure, a classical ANOVA model is estimated, then the sphericity of the covariance matrix between measures is tested using Mauchly’s test, Greenhouse-Geisser epsilon or Huynt-Feldt epsilon. If the sphericity hypothesis is not rejected, between- and within-subject effects can be tested....
Sensorielle Lebensdaueranalyse
What is sensory shelf life analysis Sensory shelf life analysis is used to evaluate the ideal period for consumption of a product using sensory evaluation of assessors at different times/dates. It may happen that the physico-chemical properties of a product are not sufficient to assess the quality of a product with respect to the period in which it is consumed. Frequently, adding sensory evaluation...
Gage Repeatability and Reproducibility (Attribute)
What is Gage Gage Repeatability and Reproducibility for Attributes Measurement System Analysis (MSA) or Gage R & R (Gage Repeatability and Reproducibility) is a method to control and judge a measurement process. It is useful to determine which sources are responsible for the variation of the measurement data. Variability can be caused by the measurement system, the operator or the parts. The word gage (or...
RV-Koeffizienten
What is the RV coefficient? The RV coefficient depicts the similarity between two matrices of quantitative variables or two configurations resulting from multivariate analysis. RV coefficient: definition This tool allows computing the RV coefficient between two matrices of quantitative variables. The RV coefficient is defined as (Robert and Escoufier, 1976; Schlich, 1996): RV(Wi,Wj) = trace(Wi,Wj)...
Univariate Diagramme
Before using advanced analysis methods you must first of all reveal the data in order to identify trends, locate anomalies or simply have available essential information such as the minimum, maximum or mean of a data sample. XLSTAT offers you a large number of descriptive statistics and charts which give you a useful and relevant preview of your data. Although you can select several variables (or...