StatSoft Announces STATISTICA Variance Estimation and Precision (VEPAC)
April 17, 2006
StatSoft, Inc. announces the general release of a new STATISTICA product, Variance Estimation and
Precision (VEPAC), for the analysis of variance used widely for research and manufacturing
applications.
VEPAC was developed by StatSoft in close collaboration with representative users, including scientists,
engineers, and statisticians from one of the largest global Pharmaceutical Research and Manufacturing
companies in the world.
The Variance Estimation and Precision (VEPAC) product provides a comprehensive set of techniques
for analyzing data from experiments that include both fixed and random effects. With VEPAC, you can
obtain estimates of variance components and use them to make precision statements while at the
same time comparing fixed effects in the presence of multiple sources of variation. In the VEPAC
module, an alternative to ANOVA estimation is provided by restricted maximum likelihood estimation
(REML). The REML method is based on quadratic forms and requires iteration to find a solution for the
variance components.
VEPAC is an augmentation of the award-winning and widely-adopted STATISTICA software suite,
enhancing the set of comprehensive STATISTICA products currently available for analysis of variance,
including General Linear Models, Generalized Linear/NonLinear Models, Design of Experiments (DOE),
and Variance Components.
VEPAC is currently used by companies in Pharmaceutical, Chemical, Petrochemical, Consumer
Products, Semiconductor, and other industries for specific applications of analysis of variance,
including:
• Evaluating method transfer between two labs of manufacturing facilities
• Evaluating the differences between treatment groups in a study that includes both fixed and random effects
• Evaluating the factors that contribute to product variability in manufacturing
• Evaluating the contributions of variation attributed to instruments, operators, raw materials, and other factors
Integrated in the VEPAC product, and also provided as a core STATISTICA Graph is a new graph type called the Variability Plot. The Variability Plot is a display of data where the underlying organization of the data collection is represented by a series of hierarchical or nested rectangles enclosing the data. This type of graph is useful to evaluate the variability of one factor within several other organizing factors.
About STATISTICA
The STATISTICA Suite of Data Analysis Applications provides the most comprehensive collection of graphics and advanced analytical tools. The application offers quick integration with virtually all database platforms, and it is built upon an open architecture with simple interfaces for macros, Visual Basic scripting, and report templates.
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