• Title, Summary, Keyword: 분포 가설

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Fuzzy Testing of Independence in Bivariate Normal Distribution (2변량 정규분포의 독립성에 관한 퍼지 검정)

  • Kang, Man-Ki;Seo, Hyun-A
    • Journal of Korean Institute of Intelligent Systems
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    • v.21 no.1
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    • pp.1-5
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    • 2011
  • We furnished some properties of fuzzy testing of independence for correlation in a bivariate normal distribution by agreement index. First we present some restriction of the fuzzy data, define fuzzy sample correlation coefficient and agreement index for testing hypothesis with acceptance or rejection degree. Also, we show that UMP unbiased fuzzy test and drawing conclusions the fuzzy test.

On the distribution-free tests for umbrella alternatives in a randomized block design (화률화 블록 계획법에서 우산형 대립가설에 대한 분포부관 검정법의 연구)

  • 김동희;김영철
    • The Korean Journal of Applied Statistics
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    • v.5 no.1
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    • pp.41-57
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    • 1992
  • Distribution-free test for umbrella alternatives in a randomized block design is proposed and asymptotic properties test statistics and the asymptotic relatives efficiency (ARE) of the proposed test statistics with respect to the Puri's parametric method are investigated. For given peak points 2,3,4, with 4 blocks and 5 treatments, and with 3 blocks and 5 treatments : for given peak point 3, with 2 blocks and 4 treatments : from the small sample Monte Carlo Study, the empirical powers between the proposed test and Puri's test are compared. Throughout the simulation results, the proposed test statistic is efficient for the heavy tailed distributions.

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A New Approach in Analysis of the Factors Affecting the Chemical Components in Brown Rice (현미중 화학성분함량 결정요인 해석에 관한 새시도)

  • Park, Hoon;Lee, Chun-Yung
    • Applied Biological Chemistry
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    • v.14 no.1
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    • pp.103-107
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    • 1971
  • The hypothesis that the grain having the same specific gravity has the same content in some chemical constituents as a genetic constant of a variety without being affected by the environmental conditions which affect only the percent distribution of grain in specific gravity was tested on nitrogen. Also the applicability of hypothesis on phosphorus, potassium, calcium and physiological significance of hypothesis were discussed.

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Nonparametric method using placement in a randomized complete block design (랜덤화 블록 계획법에서 위치를 이용한 비모수 검정법)

  • Sim, Sujin;Kim, Dongjae
    • Journal of the Korean Data and Information Science Society
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    • v.24 no.6
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    • pp.1401-1408
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    • 2013
  • Kim and Kim (1992) proposed typical nonparametric method for umbrella alternative in randomized block design with replications. In this paper, We consider a test procedure for umbrella alternatives in a randomized block design using extension of the two sample placement tests described in Orban and Wolfe (1982) and treatment tests described in Kim (1999). We perform a Monte Carlo study to compare the empirical powers of the test statistics for underlying distributions.

Statistical Estimation of Wind Speed in the Gwangyang-Myodo Region (광양 - 묘도 지역의 통계학적인 풍속 추정)

  • Bae, Yong Gwi;Han, Gwan Mun;Lee, Seong Lo
    • Journal of The Korean Society of Civil Engineers
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    • v.28 no.2A
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    • pp.197-205
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    • 2008
  • In order to estimate mean wind speed in the Gwangyang-Myodo Region, the probability distribution model of extreme values has been used in the statistical analysis of joint distribution probability of daily maximum wind speed and corresponding direction in this paper. For this purpose frequency of daily maximum records at respective stations is inquired into and sample of largest yearly wind speed of sixteen compass direction and non-direction is extracted from daily data of maximum wind speed and appropriate direction of the meteorological observing stations nearby the bridge construction site. These extreme speed records are applied to Gumbel and Weibull distribution model and parameters are estimated through method of moment and method of least squares etc. And also, distribution and parameters are inquired into whether it is fitted through the probability plot correlation coefficient examination. From fitted parameters the largest yearly wind speed of sixteen compass direction and non-direction is extrapolated taking into account factors regarding sample size of data and distance from the bridge construction site according to the appropriate stations.

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Determinants of Journals on the Fields of Technology, Innovation and Management (TIM) in China - An Analysis of Jishu Jingji (중국 기술혁신관리(TIM) 분야의 학술지 속성 결정요인 - 기술경제(技術經濟)지 분석을 중심으로)

  • Seol, Sung-Soo
    • Journal of Korea Technology Innovation Society
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    • v.14 no.4
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    • pp.813-832
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    • 2011
  • This is an analysis of three hypotheses in the fields of Technology, Innovation, and Management (TIM) analyzing the journal of Jishu Jingji (Technology Economics) which is published by the Chinese Society of Techno-economics. The Jishu Jingji journal is similar to other Chinese journals in TIM as follows: First, it's short in length. Second, there are a few references and foreign references can be counted with fingers of one hand. Third, the journal's scope is similar to others in TIM such as technolog-firm-industry. The differences are as follows: First, they have more general topics on the firm and the economy than other journals in TIM. Second, technologies covered are those of existing industries and infrastructure rather than emerging technologies and industries. Third, editors rarely submit papers to the journal. Finally, the expertise of the editors is diverse which is similar to the scope of the journal. First proposed hypothesis on journals in TIM is that journals represent country specific characteristics over field specificities, and this view is widely accepted in China. Second hypothesis is that editors are representatives of authors, but this hypothesis is rejected, at least in this journal. Third hypothesis is that the composition of editors reflects the scope of journals, and this hypothesis is generally accepted.

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A Research on the Process Analysis Technique under Non-Normal Distribution (비정규분포하에서의 공정분석기술에 관한 조사연구)

  • Kim, Jong-Gurl;Um, Sang-Joon;Kim, Young-Sub
    • Proceedings of the Safety Management and Science Conference
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    • pp.393-400
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    • 2009
  • 품질향상을 위한 효과적인 공정관리체계는 기업의 생존에 있어서 매우 중요하다. 최근에는 제품의 수명과 관련된 신뢰성이 강조되면서, 신뢰성분포로 불리는 비정규분포하에서의 공정관리가 핵심과제로 여겨지고 있다. 특히 품질특성치가 비정규분포를 따를때, 정규가설에 기초한 공정관리기술을 사용한다면 심각한 오류가 초래될 수 있기 때문에, 비정규분포에서의 관리도와 신뢰성샘플링계획에 대한 중요성이 강조되고 있다. 본 연구의 목적은 비정규분포에서의 관리도와 신뢰성샘플링계획에 대한 최근연구를 조사하고, 보다 합리적이고 신뢰도 높은 공정분석에 대한 연구동향을 소개함으로써, 비정규분포하에서의 공정관리에 대한 발전적인 연구방향을 제시하는 것이다.

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척도모수에 대한 비모수적 검정법에 관한 연구

  • 김동재
    • Communications for Statistical Applications and Methods
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    • v.3 no.3
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    • pp.169-178
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    • 1996
  • 일반적인 실험군과 대조군의 척도모수에 대한 가설을 Orban과 Wolfe(1982)가 도입한 placement를 이용하여 비모수적 검정법을 제안하였다. 위치모수를 알고 있는 경우에 제안된 통계량의 귀무가설하에서의 평균과 분산 그리고 반복점근분포(iterative asymptotic distribution)를 구하였고 기존의 검정법들과 소표본 모의실험을 통하여 실험 유의수준과 실험검정력을 비교하였다.

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국내 선도환시장의 효율성에 관한 실증분석: 불편추정치 가설의 검증

  • Kim, Byeong-Yun;Jang, Ik-Hwan
    • The Korean Journal of Financial Studies
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    • v.2 no.2
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    • pp.367-382
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    • 1995
  • 본 연구에서는 시장평균환율제가 시행된 시점인 1990년 3월 2일부터 1991년 12윌 31일까지의 국내 원/달러 외환시장을 대상으로 선도환가격의 미래 예측기능, 즉 미래의 현물환율에 대한_불편추정치로서의 선도환율의 역할을 실증적으로 검증하였다. 국내 시중은행에서 거래한 달러 대비 원화의 현물환율과 1개월 만기의 선도환율 자료를 사용한 실증분석결과에 의하면, 현물환율은 선도환이 예측한 방향과는 반대의 방향으로 움직이거나 예측한 수준에 크게 벗어나고 있다. 그러나, 외환시장에 큰 영향을 준 것으로 보여지는 동 서독 통합과 중동전쟁을 기준으로 분석대상기간을 두개의 하부기간으로 나누어 다시 추정한 결과에 의하면, 선도환가격이 미래 현물환율에 대한 불편추정치라는 가설을 기각하지 못하고 있다. 이러한 결과는 환율변화에 대한 확율분포가 시간경과에 따라 크게 변하고 있으며, 실증분석에서는 이러한 분포의 시간종속성을 반드시 고려하여야 한다는 것을 시사하고 있다. 또한, 다른 외국통화에 대한 실증분석에서는 나타나지 않는 결과로서, 이는 우리나라 외환시장의 특성을 반영하고 있는 것으로 해석된다. 시장평균환율제가 변동폭을 제한하고 있으며 분석대상 기간 동안은 환율변동이 비교적 안정적이기 때문에, 선도환가격의 결정도 비교적 안정적으로 이루어 질 수 있었다. 이와 같은 요인들에 의하여, 현물환율의 변동이 매우 심한 다른 외국통화에 비하여, 원화 환율의 경우에는 선도환가격은 만기시의 현물환율에 근접하는 경향을 보이게 된 것으로 보여진다.

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A Modification of the Shapiro-Wilk Test for Exponentiality Based on Censored Data (중도절단자료에 대한 수정된 SHAPIRO-WILK 지수 검정)

  • Kim, Nam-Hyun
    • The Korean Journal of Applied Statistics
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    • v.21 no.2
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    • pp.265-273
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    • 2008
  • Kim (2001a) presented a modification of the Shapiro and Wilk (1972) test for exponentiality based on the ratio of two asymptotically efficient estimates of scale. In this paper we modify this test statistic when the sample is censored. We use the normalized spacings based on the sample data, which was used in Samanta and Schwarz (1988) to modify the Shapiro and Wilk (1972) statistic to the censored data. As a result the modified statistics have the same null distribution as the uncensored case with a corresponding reduction in sample size. Through a simulation study it is found that the proposed statistic has higher power than Samanta and Schwarz (1988) statistic especially for the alternatives with the coefficient of variation greater than or equal to 1.