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The comparison of nonparametric statistical tests for interaction effects in factorial design [PDF]

open access: yesDecision Science Letters, 2019
Correct application of the classical factorial F-test depends on normality and homogeneity of variance assumptions. If these assumptions are violated the type I error rate will be inflated and power of the test will be decreased.
Ampai Thongteeraparp
doaj   +2 more sources

Advanced row-column designs for animal feed experiments

open access: yesIndian Journal of Animal Sciences, 2023
Inappropriate statistical designs may misinterpret results of animal feed experiments. Thus complete statistical designs can make animal feed research more appropriate and cost effective.
PRAKASH KUMAR   +5 more
doaj   +1 more source

FUNDAMENTAL CONCEPTS AND RECENT APPLICATIONS OF FACTORIAL STATISTICAL DESIGNS

open access: yesBrazilian Journal of Biometrics, 2022
Factorial designs have been increasingly used in scientific investigations and technological development. The designs, through the use of matrices with all the treatment combinations, have been capable to effectively characterize the relationships between the variables of multi-factor experiments, assess the experimental variabilities, and derive ...
Pedro Henrique MAINARDI   +1 more
openaire   +3 more sources

Raw Data Visualization for Common Factorial Designs Using SPSS: A Syntax Collection and Tutorial

open access: yesFrontiers in Psychology, 2022
Transparency in data visualization is an essential ingredient for scientific communication. The traditional approach of visualizing continuous quantitative data solely in the form of summary statistics (i.e., measures of central tendency and dispersion ...
Florian Loffing, Florian Loffing
doaj   +1 more source

Modelling and Predicting Self-Compacting High Early Age Strength Mortars Properties: Comparison of Response Models from Full, Fractioned and Small Central Composite Designs

open access: yesApplied Sciences, 2023
The mixture design of cement-based materials can be complex due to the increasing number of constituent raw materials and multiple requirements in terms of engineering performance and economic and environmental efficiency.
Nara Cangussu   +3 more
doaj   +1 more source

Statistical factorial designs for optimum production of thermostable α-amylase by the degradative bacterium Parageobacillus thermoglucosidasius Pharon1 isolated from Sinai, Egypt

open access: yesJournal of Genetic Engineering and Biotechnology, 2021
Background This study aimed to isolate potent thermophilic and amylolytic bacteria from a hot spring of Pharaoh’s bath, Sinai, Egypt, and screen its degradative activity.
Ali M. Saeed   +2 more
doaj   +1 more source

Generalizations of the Tests by Kruskal-Wallis, Friedman and van der Waerden for Split-plot Designs

open access: yesAustrian Journal of Statistics, 2023
Generalizations of the 1-factorial tests by Kruskal-Wallis and Friedman, as well as of the van der Waerden test are proposed for factorial split-plot designs, both allowing interactions.
Haiko Lüpsen
doaj   +1 more source

Efficient Blocked Fractional Factorial Designs for Stated Choice Experiments of Size Two and Four

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2023
Stated choice experiments are increasingly becoming popular due to their ability to optimize information gain with limited resources. Many designs have been developed for the selection of various attributes and their levels to form choice sets.
Emmanuel Amoah   +2 more
doaj   +1 more source

Optimization of Welding Process of Geomembranes in Biodigesters Using Design of Factorial Experiments

open access: yesEnergies, 2023
This research focuses on the optimization of the thermofusion process in the construction of biodigesters as it has a direct influence on their quality and durability.
Rocio Camarena-Martinez   +2 more
doaj   +1 more source

Analysis of frequency data: The ANOFA framework [PDF]

open access: yesTutorials in Quantitative Methods for Psychology, 2023
Analyses of frequencies are commonly done using a chi-square test. This test, derived from a normal approximation, is deemed generally efficient (controlling type-I error rates fairly well and having good statistical power).
Laurencelle, Louis, Cousineau, Denis
doaj   +1 more source

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