scholarly journals Evaluating the Impact of Seasonal Variability on Groundwater Quality using Multivariate Analysis of Variance

2019 ◽  
Keyword(s):  
Multivariate Analysis ◽  
Groundwater Quality ◽  
Analysis Of Variance ◽  
Seasonal Variability ◽  
Multivariate Analysis Of Variance ◽  
The Impact

Comparison of Four MANOVA Test Statistic for Pig Production in Delta State, Nigeria

2021 ◽  
Vol 6 (5) ◽  
pp. 43-49
Author(s):  
J. M. Aniesedo ◽  
C. N. Okoli
Keyword(s):  
Multivariate Analysis ◽  
Analysis Of Variance ◽  
Multivariate Normality ◽  
Secondary Source ◽  
Multivariate Analysis Of Variance ◽  
Test Statistic ◽  
Pig Production ◽  
Normality Test ◽  
Significant Difference ◽  
The Impact

This study used the multivariate analysis of variance (MANOVA) test statistic to examine the impact of three categories feed used in the production of pig in Delta State. The multivariate test statistic considered are the Pillai – Bartlett trace, Wilks’ Test Statistic, Roy’s Largest Root Test Statistic, and the Lawley- Hotelling (LH) Statistic. The objectives include to: evaluate the robustness of the four Multivariate Analysis of Variance test statistics to ensure that the best is employed in multivariate analysis to guarantee most useful result in pig production; determine the relatively efficient test statistic for pig production; and determine the test statistic that is consistent across the sample sizes. Secondary source of data collection was used to obtain the data required for the analysis. The outcome of the study showed that the obtained data was multivariate normally distributed based on the result of the asymmetry-based multivariate normality test and the multivariate normality test based on the kurtosis test which makes the data suitable parametric multivariate method such as multivariate analysis of variance (MANOVA). The results show that the Wilks and Roy tests found a significant difference for the intercept. While the Pillai and LH tests could not find any significance. The Roy test was also found to be significant for feed one, feed two, and feed three. The Wilks and Roy tests also turned out to be significant differences for the intercept. All test measures showed significance for feed one. The Wilks and Roy tests also showed a significant difference for feed two, while all test measures found a significance for feed one. Another result showed that none of the tests found significance for the interaction between feed one and two, while the Roy test found significance for the interaction between feed one and three, feed two and three and feed one, two and three. The performance of the test for evaluating the performance of feeds for pig production with/without considering interactions was found to be in the following order of magnitude: Roy, Wilks and Pilla = LH. This result implies that the Roy method, with or without consideration of the interaction, has a better performance of the test than the other methods considered in the study.

From Online to Offline Through Brand Extensions and Alliances

2012 ◽  
Vol 8 (1) ◽  
pp. 17-34 ◽  
Author(s):  
Rafael Bravo ◽  
Leif E. Hem ◽  
José M. Pina
Keyword(s):  
Multivariate Analysis ◽  
Empirical Study ◽  
Analysis Of Variance ◽  
Brand Image ◽  
Product Category ◽  
Brand Extensions ◽  
Multivariate Analysis Of Variance ◽  
Emotional Dimensions ◽  
Online Brands ◽  
The Impact

This paper studies the expansion of an online brand towards an offline product category through brand extensions and alliances. Specifically, it analyses the effects on the online brand image as a consequence of this expansion, and it analyses them under different conditions of image and fit. An empirical study was conducted to 407 undergraduates in a Spanish University, and data are analyzed through multivariate analysis of variance. Main results lead us to conclude that: (1) the effects of extensions and alliances are mainly negative on the online brand image, (2) the impact is focused specially on the functional and emotional dimensions of brand image (3) The effect is more negative for online brands with high image than for online brands with low image, and (4) the effect is more negative in the case of an alliance with an offline brand with low image than in the case of an alliance with an offline brand with high image or in a brand extension.

scholarly journals Workaholism in IT: An Analysis of the Influence Factors

2020 ◽  
Vol 10 (4) ◽  
pp. 96
Author(s):  
Octavian Dospinescu ◽  
Nicoleta Dospinescu
Keyword(s):  
Multivariate Analysis ◽  
Regression Analysis ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Influencing Factors ◽  
Analysis Of Variance ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Multivariate Analysis Of Variance ◽  
The Impact

The purpose of this article is to make an exhaustive analysis of the influencing factors for the phenomenon of workaholism in IT. In contemporary economies, workaholism is an increasingly common phenomenon. Companies should evaluate the impact on workers of this trend, and note that knowledge of the factors influencing the decision to overwork can be a competitive advantage when implementing human resources policies. Our approach involved the use of multivariate analysis of variance combined with multiple linear regression analysis. The article analyzes the data from 178 respondents who are employed in the IT sector in Romania, taking into account seven potential factors of influence. The data and econometric analyses were processed in IBM SPSS Software. The results of the multivariate analysis of variance combined with multiple linear regression analysis show a significant relationship between workaholism and influencing factors such as the remunerative component of work, the intrinsic pleasure of working, the sense of responsibility towards family, and the desire to develop during a professional career. In this study, socio-demographic influences were found to have a weak influence on the decision to work excessively.

Selflessness in Anorexia Nervosa as Reflected in the Rorschach Comprehensive System

2012 ◽  
Vol 33 (1) ◽  
pp. 78-93 ◽  
Author(s):  
Gili Curiel-Levy ◽  
Laura Canetti ◽  
Esti Galili-Weisstub ◽  
Myrna Milun ◽  
Eitan Gur ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Anorexia Nervosa ◽  
Analysis Of Variance ◽  
Clinical Observation ◽  
Comparison Group ◽  
Comprehensive System ◽  
Multivariate Analysis Of Variance ◽  
Rorschach Comprehensive System ◽  
Group A

This study examines the expression of selflessness – the tendency to ignore one’s own needs and serve others’ needs – in Rorschach protocols of women suffering from anorexia nervosa. The protocols of 35 women suffering from anorexia nervosa were compared to 30 protocols of a psychiatric comparison group. A multivariate analysis of variance over five variables (AG, PER, PHR, COP, and GHR) was significant: Anorexic patients showed higher characteristics of selflessness compared to the psychiatric comparison group. These findings contribute to the validation of the Rorschach technique and to the clinical observation of selflessness in anorexic patients, and they emphasize specific characteristics in the treatment of anorexia nervosa patients.

A Controlled Study of Sensation Awareness and Verbal Disclosure for Regulation of Arousal and Anxiety

1992 ◽  
Vol 74 (1) ◽  
pp. 307-320 ◽  
Author(s):  
Stephen R. Scholle
Keyword(s):  
Multivariate Analysis ◽  
Analysis Of Variance ◽  
State Anxiety ◽  
Significant Interaction ◽  
Controlled Study ◽  
Multivariate Analysis Of Variance ◽  
Directed Attention ◽  
Self Talk ◽  
Anxiety Levels

Interactions of attention and verbalization were investigated for effects of self-reported arousal and state-anxiety. Levels of verbalization from silence through talking-without-a-listener to disclosure were compared while self-directed attention was manipulated for sensation versus general thoughts and feelings. Following a stimulus, disclosure of sensations was expected to reduce state anxiety and increase energetic arousal significantly more than disclosure of thoughts. Based on a randomly assigned sample of 120 men, a 3 × 2 × 2 multivariate analysis of variance indicated a significant interaction in the predicted directions. A significant interaction was also found for the 3 × 2 interaction for energetic arousal. For state anxiety means were in the predicted direction. Results indicate that verbalization of sensations is more energizing and calming than silence, while for general thought, silence is more energizing and calming than verbalization. The results suggest efficacy in reframing self-talk to quiet awareness and in communicating sensed distinctions as they emerge.

Extended linear hypotheses and simultaneous tests in multivariate analysis of variance

Biometrika ◽  
1974 ◽  
Vol 61 (3) ◽  
pp. 467-477 ◽  
Author(s):  
G. S. MUDHOLKAR ◽  
M. L. DAVIDSON ◽  
P. SUBBAIAH
Keyword(s):  
Multivariate Analysis ◽  
Analysis Of Variance ◽  
Multivariate Analysis Of Variance

Investigation of Variation in Fatigue Life Calculated Using Damage Fraction

1990 ◽  
Vol 35 (2) ◽  
pp. 35-41
Author(s):  
Clifford T. Gunsallus ◽  
Edward Nagy ◽  
Patrick G. Stennett ◽  
William G. Flannelly
Keyword(s):  
Multivariate Analysis ◽  
Fatigue Life ◽  
Analysis Of Variance ◽  
Multivariate Analysis Of Variance ◽  
Curve Reduction

This paper identifies the leading causes for large variations in the calculated fatigue lives of the hypothetical pitch link experiment of the American Helicopter Society, conducted in cooperation with all U.S. manufacturers of military helicopters. Multivariate Analysis of Variance (MANOVA) is used to show that approximately 85 percent of the variations can be attributed to only two of the five analytical steps involved and the interactions between them. These steps are the method of cycle counting and the amount of S/N curve reduction.

Relationship of Curriculum Area and Course Format with Student Ratings of Instruction

1978 ◽  
Vol 15 (4) ◽  
pp. 483-487 ◽  
Author(s):  
Isaac I. Bejar ◽  
Kenneth O. Doyle
Keyword(s):  
Multivariate Analysis ◽  
Analysis Of Variance ◽  
Significant Relationship ◽  
Student Ratings ◽  
Multivariate Analysis Of Variance ◽  
Student Ratings Of Instruction ◽  
Course Format ◽  
Curriculum Area ◽  
Relationship Of

Multivariate analysis of variance revealed a significant relationship between student ratings and curriculum area but not between ratings and course format. The technical and practical ramifications of these findings are discussed.

Bird distributional patterns support biogeographical histories and are associated with bioclimatic units in the Atlantic Forest, Brazil

Zootaxa ◽  
2017 ◽  
Vol 4337 (2) ◽  
pp. 223 ◽  
Author(s):  
CRISTIANO DE SANTANA CARVALHO ◽  
NAYLA FÁBIA FERREIRA DO NASCIMENTO ◽  
HELDER F. P. DE ARAUJO
Keyword(s):  
Multivariate Analysis ◽  
Atlantic Forest ◽  
Analysis Of Variance ◽  
Forest Birds ◽  
Distributional Pattern ◽  
Parsimony Analysis ◽  
Multivariate Analysis Of Variance ◽  
Distributional Patterns ◽  
Parsimony Analysis Of Endemicity

Rivers as barriers to dispersal and past forest refugia are two of the hypotheses proposed to explain the patterns of biodiversity in the Atlantic Forest. It has recently been shown that possible past refugia correspond to bioclimatically different regions, so we tested whether patterns of shared distribution of bird taxa in the Atlantic Forest are 1) limited by the Doce and São Francisco rivers or 2) associated with the bioclimatically different southern and northeastern regions. We catalogued lists of forest birds from 45 locations, 36 in the Atlantic forest and nine in Amazon, and used parsimony analysis of endemicity to identify groups of shared taxa. We also compared differences between these groups by permutational multivariate analysis of variance and identified the species that best supported the resulting groups. The results showed that the distribution of forest birds is divided into two main regions in the Atlantic Forest, the first with more southern localities and the second with northeastern localities. This distributional pattern is not delimited by riverbanks, but it may be associated with bioclimatic units, surrogated by altitude, that maintain current environmental differences between two main regions on Atlantic Forest and may be related to phylogenetic histories of taxa supporting the two groups. 

Multivariate analysis of variance of designed chromatographic data. A case study involving fermentation of rooibos tea

2017 ◽  
Vol 1489 ◽  
pp. 115-125 ◽  
Author(s):  
Federico Marini ◽  
Dalene de Beer ◽  
Nico A. Walters ◽  
André de Villiers ◽  
Elizabeth Joubert ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Analysis Of Variance ◽  
Multivariate Analysis Of Variance ◽  
Chromatographic Data ◽  
Rooibos Tea
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