• Title/Summary/Keyword: Statistical terms

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Interpretation of Statistical Quality Techniques in the Perspective of Accuracy and Precision (정확도 및 정밀도 관점에서의 통계적 품질기법의 해석)

  • Choi, Sung-Woon
    • Journal of the Korea Safety Management & Science
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    • v.9 no.1
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    • pp.119-131
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    • 2007
  • Engineer and quality statistician use different terms and techniques but they have same meaning and concept. The terms accuracy and precision are frequently used by engineer and scientist in the department of R&D and production technology. This paper makes a contribution to the interpretation of statistical quality techniques by the use of accuracy and precision. Engineer and scientist who have six sigma black belt and statistical background can use efficiently and effectively accuracy and precision in a manner consistent with statistical usage according to this study.

Understanding Statistical Terms: A Study with Secondary School and University Students

  • Garcia Alonso, Israel;Garcia Cruz, Juan Antonio
    • Research in Mathematical Education
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    • v.14 no.2
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    • pp.143-172
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    • 2010
  • In this paper, we present an analysis of how students understand some statistical terms, mainly from inferential statistics, which are taught at the high school level. We focus our analysis on those terms that present more difficulties and are persistent in spite of having been studied until the college level. This analysis leads us to a hierarchical classification of responses at different levels of understanding using the SOLO theoretical framework.

Present Status of Description and Application of Statistics in Clinical study papers in the Journal of Oriental Neuropsychiatry. (동의신경정신과학회지에 발표된 임상연구논문들의 통계방법 기술 및 적용 현황)

  • Cho, Seung-Hun;Hwang, Wei-wan;Lee, Tae-Rim
    • Journal of Oriental Neuropsychiatry
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    • v.18 no.3
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    • pp.15-21
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    • 2007
  • This study was done to review problems in terms of statistical description and statistical application and analysis. Methods; The authors reviewed 42 statistical clinical study papers excluding 12 Overview papers, 75 Descriptive papers, 48 Animal studies out of 177 papers in the Journal of Oriental Neuropsychiatry in the 5 years from 2002 to 2006. Results : 1) 3 papers(7.1%) had no description of statistical method, only P-values, 25 papaers(59.5%) had tables without description of statistical method, 1 paper (2.3%) had no description of statistical method in study method. 2) 10 papers(23.8%) contained problems in terms of statistical application and analysis. 6papers (6/23, 26.0%) for Student t-test, 2 papers(2/7 28.6%)for $X^2$- test, 1 paper(1/15 6.7%) for the analysis of variance, 1 paper(1/6 16.7%) for Pearson correlation contained statistical problems. Conclusion : It was suggested that consultation of investigators with statisticians and more extensive statistical refereeing, the form of the guidelines for description and application of statistics are needed.

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Fisher's Second k Statistics

  • Hwang, Hark
    • Journal of the Korean Statistical Society
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    • v.6 no.1
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    • pp.21-24
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    • 1977
  • The cumulants of the sample variance are obtained in terms of the population cumulants using ALMAP (Algebraic Manipulation Package) and these results extend those of Fisher who gave the first six cumulants of the sample variance.

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On the Srivastava's Theorem for the search design.

  • Um, Jung-Koog
    • Journal of the Korean Statistical Society
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    • v.9 no.2
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    • pp.126-134
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    • 1980
  • In this paper, Srivastava's Theorem for the search design is considered, with additional assumptions, to the $3^n$ parallel flats fractions. It is also expressed in terms of ACPM.

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A Hybrid Approach to Statistical Process Control

  • Giorgio, Massimiliano;Staiano, Michele
    • International Journal of Quality Innovation
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    • v.5 no.1
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    • pp.52-67
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    • 2004
  • Successful implementation of statistical process control techniques requires for operational definitions and precise measurements. Nevertheless, very often analysts can dispose of process data available only by linguistic terms, that would be a waste to neglect just because of their intrinsic vagueness. Thus a hybrid approach, which integrates fuzzy set theory and common statistical tools, sounds useful in order to improve effectiveness of statistical process control in such a case. In this work, a fuzzy approach is adopted to manage linguistic information, and the use of a Chi-squared control chart is proposed to monitor process performance.

Statistical quality control in korea (한국의 통계적 품질관리 기법 활용 현황)

  • 김재주;정해성
    • The Korean Journal of Applied Statistics
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    • v.4 no.1
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    • pp.65-83
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    • 1991
  • In order to know the situation of statistical Quality Control in Korea, we have surveyedabout 4, 500 manufacturing companies in Korea. Among the first 4, 500 manufacturing companies, 2, 586 companies have answered for the questionairs of the sample survey. In this research a statistical analysis is conducted for the 2, 586 companies and diagnosis of the situation of Statistical Quality Control is Korea in presented in terms of levels of development and degrees of implementation.

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