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Method comparison (Bland Altman, …)

When to use method comparison When developing a new method you might want to be sure that the results are similar to a reference or a comparable method. If there is a difference, you should investigate the reasons. It may be due to a bias that depends on the position on the scale variation. In addition If a new measurement method is preferred for economic reasons, but do not performed as good as the...

RV coefficient

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)...

Association rules for market basket analysis tutorial

Multiple Correspondence Analysis (MCA) in Excel OLD

Gage Repeatability and Reproducibility (Quantitative)

What is Gage R&R for quantitative variables (Measurement System Analysis) Measurement System Analysis (MSA) or Gage R&R (Gage Repeatability and Reproducibility) is a method to control and assess 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. Gage...

RATA data analysis

This method allows: Study and visualize the links between the products and attributes. Study the agreements between the assessors. Perform a cluster analysis of the assessors WHAT IS RATA DATA ANALYSIS? RATA data analysis is a method used in sensory evaluation to collect and analyze data on consumer perceptions of products. RATA is useful for assessing sensory characteristics of products, informing...

Analysis of a screening design

Analysis of a screening design uses the same conceptual framework as linear regression and variance (ANOVA). The main difference comes from the nature of the underlying model. In ANOVA, explanatory variables are often called factors. 

Multivariate Analysis of Variance (MANOVA)

Description of the MANOVA in XLSTAT General description The MANOVA uses the same conceptual framework as the ANOVA. The main difference comes from the nature of the dependent variables: instead of a single one, we can study many of them. With the MANOVA, explanatory variables are often called factors. Effects of factors are estimated on a combination of several response variables. The advantage of...

Reliability Analysis

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...

Sensitivity and specificity analysis

Sensitivity and specificity analysis allows evaluating the performance of a test. Available in Excel using the XLSTAT add-on statistical software. What is sensitivity and specificity analysis? Sensitivity and Specificity analysis is used to assess the performance of a test. In medicine, it can be used to evaluate the efficiency of a test used to diagnose a disease or in quality control to detect the...