The relation between sample and population characteristic vectors

Psychometrika ◽  
1970 ◽  
Vol 35 (2) ◽  
pp. 163-178 ◽  
Author(s):  
Norman Cliff
Keyword(s):  
Population Characteristic

An efficient method of estimating the true value of a population characteristic from its discrepant estimates

2009 ◽  
Vol 53 (6) ◽  
pp. 2378-2389 ◽  
Author(s):  
P.A.V.B. Swamy ◽  
Jatinder S. Mehta ◽  
I-Lok Chang ◽  
T.S. Zimmerman
Keyword(s):  
Efficient Method ◽  
Population Characteristic ◽  
True Value

scholarly journals Genetic and epigenetic factors of caries

2021 ◽  
Vol 105 (1) ◽  
pp. 18-22
Author(s):  
O. Bilynskyi ◽  
◽  
Ye. Kostenko ◽  
Keyword(s):  
Environmental Factors ◽  
Critical Role ◽  
Genetic Component ◽  
Caries Prevalence ◽  
Epigenetic Factors ◽  
Poor Oral Hygiene ◽  
Population Characteristic ◽  
Component Type ◽  
Analytical Approaches

Summary. The paper analyzes the literature on the causes of caries, including the most common epigenetic factors, such as poor oral hygiene, adequate or deficient nutrition, the nature of food, biogeochemical and territorial factors, the content of microelements of water and soil, the level of environmental pollution, etc., as well as considering the genetic component, type of blood group, the structure of the hard tissues of the tooth, including a set of genes responsible for the occurrence and development of carious pathology. It was found that in conditions of fluoride and iodine deficiency, environmental factors have a critical role in the formation of the population-characteristic pattern of changes in dental status associated with the prevalence and intensity of caries. However, variations in these indicators may be partly mediated by the influence of genetically associated factors. The results of the analysis allowed to identify opportunities for the formulation of several independent analytical approaches that would help establish the significance of the genetic component in the structure of caries prognosis in terms of interaction with environmental conditions, actually determining how certain environmental factors can influence changes in genetic predisposition to caries. It can be summarized, that all currently available studies of the role of heredity in the risk structure of caries pathology is divided into two broad categories: identification of specific localized changes in genotype and verification of combinations or sets of such changes that can determine caries risk. Key words: caries, caries intensity, caries prevalence, genetics, twins, epigenetics, environment, saliva pH.

Paper 25: Reliance on Statistics

1969 ◽  
Vol 184 (2) ◽  
pp. 184-189
Author(s):  
H. L. Cox ◽  
A. J. Fenner
Keyword(s):  
Extreme Values ◽  
General Characteristic ◽  
Population Characteristic ◽  
Inappropriate Choice

This paper reviews the probable characteristics of the populations the engineer is likely to encounter, and considers the dangers inherent in reliance upon analysis based on a characteristic not truly representative of the population. For comparison between two or more samples, an inappropriate choice of population characteristic may not matter a great deal; but any estimate of extreme values must depend vitally upon our confidence, on grounds quite independent of the samples themselves, that the samples are indeed drawn from populations having the same general characteristic, albeit one different from that on which the comparison is based.

scholarly journals Population Characteristic and Genetic Relationship on 25 Bengkulu Heirloom Rice Based on Morpgological Traits

Akta Agrosia ◽  
2019 ◽  
Vol 22 (2) ◽  
pp. 77-83
Author(s):  
Rustikawati Rustikawati ◽  
Marulak Simarmata ◽  
Hesti Pujiwati ◽  
Catur Herison
Keyword(s):  
Genetic Relationship ◽  
Genetic Parameters ◽  
Similarity Coefficient ◽  
Population Characteristic ◽  
Group I ◽  
Trait Improvement ◽  
High Heritability ◽  
Rice Genotypes ◽  
High Yielding Varieties ◽  
Relationship Of

Bengkulu Province has many local rice germplasms that have adapted to specific areas. The germplasm has certain character advantages so that it is maintained by farmers. The characteristics of each germplasm need to be identified in order to improve the properties of the existing germplasm. This study aimed to determine the performance, to estimate the value of genetic parameters, and to determine the genetic relationship of local rice genotypes collected from four districts in Bengkulu Province. The results showed that the ‘Kuning Sulaowangi’ genotype was the earliest in maturity had the highest number of tillers amongst genotypes. Genotypes which have significantly the highest average component yields were ‘Kunig Air Dingin’ and ‘Impera’.  Traits that have a high heritability estimated value were weight of 100 grains (91.046%) and grain weight per panicle (80.252%). The weight of 100 grains also has the highest genetic variability value. Thus increasing local rice production is possible. Based on the results of the analysis with the similarity coefficient of 55%, the local rice genotypes could be grouped into two groups.  Group I consisted of 9 genotypes namely ‘Kuning Pendek’, ‘Humbur’, ‘Cantik’, ‘Pandak Kelabu’, ‘Cisadane Putih’, ‘Kuning Sulaowangi’, ‘China Abang’, ‘China Putih’ and ‘Impera’. Other genotypes were in Group II.  Trait improvement can be done through hybridization between individuals of different groups. To develope early in maturity and high-yielding varieties can be done through hybridization of the ‘Kunig Sulaowangi’ and ‘Kunig Air Dingin’

Latino linguistic repertoires in an intensely-segregated Black and Latina/o high school: Is this super-diversity?

2016 ◽  
Vol 2016 (241) ◽  
Author(s):  
Danny C. Martinez
Keyword(s):  
High School ◽  
Language Arts ◽  
English Language ◽  
Urban Community ◽  
Latino Youth ◽  
Language Practices ◽  
Population Characteristic ◽  
Contact Zones ◽  
Historical Past ◽  
The U.S

AbstractThis article explores the communicative interactions of one Latino youth, Lorenzo, in an English Language Arts classroom located in an intensely-segregated Black and Latino urban community. While the larger city in which this school is located is known for its diverse cosmopolitan population characteristic of super-diversity, I argue that Lorenzo’s language practices index his socialization in contact zones shaped by Black and Latina/o cultural and linguistic practices. While sociolinguistic perspectives on super-diversity might offer an explanation for the repertoires of languages uttered by Lorenzo and his Black and Latina/o peers, the language practices explored are reflective of the cultural historical experiences of Lorenzo’s intensely-segregated community which have been practiced prior to any conceptualization of super-diversity. Drawing on super-diversity research, language ideological inquiry and language crossing and sharing scholarship, this article calls for further attention to the cultural historical past of Black and Latina/o communities in future discussions of super-diversity in the U.S.

scholarly journals Grobovi tipa Mala Kopašnica – Sase: narativ o kontinuitetu

2016 ◽  
Vol 11 (3) ◽  
pp. 711
Author(s):  
Tatjana Cvjetićanin
Keyword(s):  
Roman Domination ◽  
Population Characteristic ◽  
Burial Practices ◽  
Local Identities ◽  
Starting Point ◽  
General Similarity ◽  
Autochthonous Population ◽  
Funerary Customs ◽  
Grave Goods

The graves with cremated burials labelled as Mala Kopašnica – Sase type, supposedly covering more than 70% of registered burials in Moesia Superior, are considered to be an autochthonous form, associated to pre-Roman population, characteristic for the Moesian-Dacian region from 1st to 3rd centuries, rarely spanning to the beginning of 4th century. The general similarity of burial form and relative homogeneity of grave goods are taken as arguments in the interpretation of the key concept of continuity of the prehistoric practices, but as well of unchanged burial practices and continuity of funerary customs lasting at least two centuries of the Roman domination, its cultural superiority, and visible transformation of local identities as a result of systemic and standardized Romanization, and finally, of identification of the autochthonous population of Moesia Superior as actors of this practice. The paper discusses the necropolis Gomilice near Guberevac, the only systematically investigated one in the area of Roman imperial mines at Kosmaj, with domineering burial type of Mala Kopašnica – Sase, as the starting point in reconsidering the current interpretation of this type of burial.

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