• 제목/요약/키워드: Test of Normality

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T-test분석을 통한 녹색건축인증 유무에 따른 공동주택의 매매가격 비교 분석 (A Comparison Analysis on the Sales Price of Apartments according to G-SEED by Using T-test)

  • 전상섭;손기영;이주형;오준석;손승현
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2019년도 추계 학술논문 발표대회
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    • pp.207-208
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    • 2019
  • Currently, as the public interest for environmental issues has grown rapidly, the needs for G-SEED have also increased. However, as investment according to eco-friendly elements is inevitable to receive G-SEED certification, it is necessary to find out whether or not the sales price of apartments have increased compared to investment costs. Therefore, the objective of this study is to analyze the sales price of apartments according to G-SEED by using T-test. To achieve the objective, First, variables affecting on the sales price of apartments are selected. Second, the data are collected by using GIS(Geographic Information System). Third, after testing the normality, a comparison analysis is conducted on the sales price between G-SEED certified and non-certified apartments by using T-test. As a result, it is concluded that G-SEED certified apartments are more expensive than non-certified apartments. In the future, these findings can be utilized to develop of apartments price calculation model based on the G-SEED.

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분할 역회귀모형에서 차원결정을 위한 점근검정법 (Asymptotic Test for Dimensionality in Sliced Inverse Regression)

  • 박종선;곽재근
    • 응용통계연구
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    • 제18권2호
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    • pp.381-393
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    • 2005
  • 회귀모형에서 필요한 설명변수들의 선형결합들을 탐색하기 위한 방법 중의 하나로 분할역회귀모형을 들 수 있다. 이러한 분할역회귀모형에서 모형에 필요한 설명변수들의 선형결합의 수, 즉 차원을 결정하기 위한 여러 가지의 검정법들이 소개 되었으나 설명변수들의 정규성 가정을 필요로 하거나 다른 제약이 있다. 본 논문에서는 주성분분석에 대한 확률모형을 이 용하여 정규성가정을 필요로하지 않으며 분할의 수에 로버스트한 검정법을 소개하고 모의실험과 실제자료에 대한 적용결과를 통하여 기존의 검정법과 비교하였다.

A generalized Hollander-Proschan test for NBUE alternative based on U-statistics approach

  • Hassan, M.KH.
    • International Journal of Reliability and Applications
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    • 제16권2호
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    • pp.113-122
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    • 2015
  • In this paper, we introduce U-statistics approach to generalized Hollander-Proschan test for new better than used (NBUE) alternative. We prove, the proposed test is equivalent to test was introduced by Anis and Mitra (2011) and includes test was introduced by Hollander Proschan (1975). Also, the asymptotic properties are studied. The powers of our test are estimated. The Pitman asymptotic efficiencies of proposed test are also calculated. Finally, the test is applied to some real data.

New Test for IDMRL(DIMRL) Alternatives using Censored Data

  • Na, Myung-Hwan;Lee, Hyun-Woo
    • Journal of the Korean Data and Information Science Society
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    • 제10권1호
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    • pp.57-65
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    • 1999
  • In a resent paper, Na, Lee and Kim(1998) develop a test statistic for testing whether or not the mean residual life changes its trend based on complete data and show that the new test performs better than previously known tests. In this paper, we extend their test to the randomly censored data. The asymptotic normality of the test statistic is established. Monte Carlo simulations are conducted to compare our test with a previously known test by the power of tests.

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서천지방의 지상풍 연변화에 관하여 (On the Annual Change of Surface Wind at Seocheon, Korea)

  • 문승의;김백조
    • 한국환경과학회지
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    • 제7권3호
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    • pp.375-382
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    • 1998
  • 우리나라 서해안에 위치한 서천지방 연안에 10m기상 관측탑을 설치하여 1년동안 관측한 바람자료를 사용하여 지상풍의 기초 통계량, 정상도 및 월별 정규성 검정을 조사하였다. 해륙풍과 같은 국지순환의 영향으로 8훨과 9월에 조차 북풍계열이 나타났다. 두 바람성분간의 상관계수는 6월과 9월사이, 10월과 4월사이 기간동안에 각각 양((+)과 음(-)의 값으로 나타났다. 바람의 정상도는 겨울철에 높게.여름철에 낮게 나타났다. 샘플링 시간이 증가함에 따라 S값의 modal이 감소하고 최대 발생빈도값이 5값의 낮은 영역으로의 이동이 뚜렷하게 나타났다. 패도와 초가 첨도에 기초한 월별 정규성 검정으걸 부터 바람의 동서성분은 봄철에. 남북성분은 늦여름과 초가을에 각각 정규분포를 가짐을 알 수 있었다.

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A new test of exponentiality against NDVRL

  • Hassan, M.KH.
    • International Journal of Reliability and Applications
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    • 제16권2호
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    • pp.123-133
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    • 2015
  • In this paper, the problem of testing exponentiality against net decreasing variance residual lifetime (NDVRL) classes of life distributions is investigated. For this property a nonparametric test is presented based on kernel method. The test is presented for complete and right censored data. Furthermore, Pitman's asymptotic relative efficiency (PARE) is discussed to assess the performance of the test with respect to other tests. Selected critical values are tabulated. Some numerical simulations on the power estimates are presented for proposed test. Finally, numerical examples are presented for the purpose of illustrating our test.

Asymptotic Relative Efficiency of t-test Following Transformations

  • Yeo, In-Kwon
    • Journal of the Korean Statistical Society
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    • 제26권4호
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    • pp.467-476
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    • 1997
  • The two-sample t-test is not expected to be optimal when the two samples are not drawn from normal populations. According to Box and Cox (1964), the transformation is estimated to enhance the normality of the tranformed data. We investigate the asymptotic relative efficiency of the ordinary t-test versus t-test applied transformation introduced by Yeo and Johnson (1997) under Pitman local alternatives. The theoretical and simulation studies show that two-sample t-test using transformed date gives higher power than ordinary t-test for location-shift models.

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Testing NBUCA Class of Life Distribution Using U-Test

  • Al-Nachawati, H.
    • International Journal of Reliability and Applications
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    • 제8권2호
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    • pp.125-135
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    • 2007
  • In this paper, testing exponentiality against new better than used in convex average and denote by (NBUCA), or its dual (NWUCA) is investigated through the U-test. The percentiles of these tests are tabulated for samples sizes n = 5(1)40. The power estimates of the test are simulated for some commonly used distributions in reliability. Pitman's asymptotic efficiency of the test is calculated and compared. Data of 40 patients suffering from blood cancer disease (Leukemia) is considered as a practical application of the proposed test in the medical sciences.

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A JONCKHEERE TYPE TEST FOR THE PARALLELISM OF REGRESSION LINES

  • Jee, Eunsook
    • 한국수학교육학회지시리즈B:순수및응용수학
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    • 제20권2호
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    • pp.109-116
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    • 2013
  • In this paper, we propose a Jonckheere type test statistic for testing the parallelism of k regression lines against ordered alternatives. The order restriction problems could arise in various settings such as location, scale, and regression problems. But most of theory about the statistical inferences under order restrictions has been developed to deal with location parameters. The proposed test is an application of Jonckheere's procedure to regression problem. Asymptotic normality and asymptotic distribution-free properties of the test statistic are obtained under some regularity conditions.