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Suavización de series temporales
Several smoothing methods are available in the XLSTAT-Forecast solution. They are described below. Simple exponential smoothing This model is sometimes referred to as Brown's Simple Exponential Smoothing, or the exponentially weighted moving average model. Exponential smoothing is useful when one needs to model a value by simply taking into account past observations. It is called "exponential" because...
Pruebas de tendencia de Mann-Kendall
Utilice esta herramienta para determinar con una prueba no paramétrica si es posible identificar una tendencia en una serie, incluso si existe un componente estacional en la serie.
Modelo de Mezclas Gaussianas
What are the Gaussian mixture models? Mixture modeling were first mentioned by Pearson in 1894 but their development is mainly due to the EM algorithm (Expectation Maximization) of Dempster et al. in 1978. These models are commonly used for a clustering purpose. They can provide a framework for assessing the partitions of the data by considering that each component represents a cluster. These models...
Análisis de datos CATA
What is CATA (check-all-that-apply) analysis? CATA (check-all-that-apply) surveys have become more and more popular for sensory product characterization since 2007, when it was presented by Adams et al. CATA surveys allow to focus on consumers, more representative of the market, instead of trained assessors. They are easy to set up and easy for participants to answer. The principle is that each assessor...
XLSTAT-R
¿Qué es XLSTAT-R? XLSTAT-R es una interfaz revolucionaria diseñada para utilizar y escribir procedimientos R dentro de los cuadros de diálogo de XLSTAT en Microsoft Excel. Los usuarios finales se benefician de las ilimitadas posibilidades de R sin tener que abandonar Microsoft Excel, donde se almacenan sus datos. ¿Cuáles son las ventajas de XLSTAT-R? Con XLSTAT-R, podrá: Aplicar muchos procedimientos...
Análisis conjunto
What is conjoint analysis? Conjoint analysis is a comprehensive method for the analysis of new products in a competitive environment. This tool allows you to carry out the step of analyzing the results obtained after the collection of responses from a sample of people. It is the fourth step of the analysis, once the attributes have been defined, the design has been generated and the individual responses...
PROCESO : MODERACIÓN Y MEDIACIÓN
PROCESS es un método complementario al enfoque PLS-SEM muy popular en el campo del marketing, así como en las ciencias sociales y del comportamiento. PROCESS se descompone en torno a dos conceptos principales: mediación y moderación. El análisis de mediación se utiliza para probar hipótesis que aclaran los diversos mecanismos intermedios por los que surgen los efectos causales, mientras que el análisis...
MANOVA PERMUTACIONAL O ADONIS
Adonis es una técnica utilizada en ecología para explicar comunidades con variables ambientales. Análisis multivariado permutado de la varianza (PERMANOVA) El análisis multivariado permutado de la varianza (PERMANOVA), también llamado MANOVA no paramétrico (NPMANOVA), es un modelo utilizado en ecología y biología para explicar comunidades con variables ambientales. Su objetivo es similar al del análisis...
Máquina de Vectores de Soporte
Use this method to perform a binary classification, a multi-class classification or a regression on a set of observations described by qualitative and/or quantitative variables (predictors). What is the Support Vector Machine? The Support Vector Machine (SVM) is a supervised machine learning technique that was invented by Vapnik and Chervonenkis in the context of the statistical learning theory (Vapnik...
Diseños para el análisis conjunto basado sobbre la selección
Principle of design of experiments for choice based conjoint (CBC) analysis The principle of conjoint analysis is to present a set of products (also known as profiles) to the individuals who will note, class, or choose some of them. In an ideal analysis, individuals should test all possible products. But it is soon impossible; the capacity of each being limited and the number of combinations increases...