Applications of Modified Chi-Squared Tests

Voinov, Vassilly; Nikulin, Mikhaïl

doi:10.1016/b978-0-12-397194-4.00007-7

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…To do this, we first analyzed whether the sample data fit a certain distribution; that is, if the data were proportionally distributed in the lateral execution of the technique. For this, we applied the goodness of fit χ 2 test (Balakrishnan et al., 2013), comparing the observed frequencies with those expected under the hypothesis that the lateral execution of a technique would be distributed uniformly. We set statistical significance at p < 0.05.…”

Section: Methodsmentioning

confidence: 99%

Observational Analysis of Lateral Preference in Kumite Initiation: A Starting Point in the Longitudinal Programming of Formative Karate

et al. 2021

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We used observational methodology to analyze lateral conditioning in the technical-tactical performance of high level 8–9-year-old karatekas, specifically in relation to the guard action that supports the technical action and the body segment with which it is performed. We designed an ad hoc observation instrument to analyze lateral preference in the technical-tactical actions that take place during the kumite. We relied on LINCE software for data registration, and we found good inter-observer reliability, calculated with Cohen's Kappa coefficient. Generalizability Theory supported the homogeneity of the behavior deployed by these combatants. Our results represent a starting point in the longitudinal programming of karate. By relating our results and those of other studies that have addressed lateral performance in formative karate in the kumite modality, we are able to draw a roadmap of a karateka's path towards the equilaterality that is inherent in an elite competitor: (a) the 8-9 year old karateka must overcome a conditioned lateral prevalence by adopting a forward non-dominant leg guard so as to then attack with the dominant body segment; (b) the eqilateral use of the right or left fist must occur later, between the 12–13 year age group and the senior category; and (c) there will then be less decisive lateral conditioning in the execution of offensive leg techniques.

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Section: Methodsmentioning

confidence: 99%

Observational Analysis of Lateral Preference in Kumite Initiation: A Starting Point in the Longitudinal Programming of Formative Karate

et al. 2021

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“…The Chi-square goodness of fit test is a test that determines whether the variable is likely to come from a specified distribution or not. It was proposed by Pearson (1900) 4 . It is also known as statistical tests 5 .…”

Section: Introductionmentioning

confidence: 99%

Selection Of Models For The Regression Problems In Biology Using Chi-Square Test

Gupta¹

2022

Preprint

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Biological systems, at all scales of organization from nucleic acids to ecosystems, are inherently complex and variable. Therefore mathematical models have become an essential tool in systems biology, linking the behavior of a system to the interaction between its components. Parameters in empirical mathematical models for biology must be determined using experimental data, a process called regression because the experimental data are noisy and incomplete. The term "regression" dates back to Galton's studies in the 1890s. Considering all this, biologists, therefore, use statistical analysis to detect signals from the system noise. Statistical analysis is at the core of most modern biology and many biological hypotheses, even deceptively. Regression analysis is used to demonstrate association among the variables believed to be biologically related and fit the model to give the best model. There are two types of regression, linear and nonlinear regression to determine the best fit of the model. In this manuscript, we perform a least squares error fit to different models and select the best fit model using the chi-test, and determine the p-value of the selected model to data that was collected when various doses of a drug were injected into three animals, and the change in blood pressure for each animal was recorded.

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Applications of Modified Chi-Squared Tests

Cited by 2 publications

References 23 publications

Observational Analysis of Lateral Preference in Kumite Initiation: A Starting Point in the Longitudinal Programming of Formative Karate

Observational Analysis of Lateral Preference in Kumite Initiation: A Starting Point in the Longitudinal Programming of Formative Karate

Selection Of Models For The Regression Problems In Biology Using Chi-Square Test

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