| A STATISTICAL PROCEDURE TO EVALUATE CLEAN-UP STANDARDS |
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| 作者姓名： | ROBERT O'BRIEN BIMAL K.SINHA WILLIAM P.SMITH Statistical Policy Branch Environmental Protection Agency M St. SW Washington DC U.S.A. |
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| 作者单位： | ROBERT O'BRIEN BIMAL K.SINHA WILLIAM P.SMITH Statistical Policy Branch，Environmental Protection Agency，401 M St.，SW，Washington，DC 20460，U.S.A. |
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| 摘 要： | The object of this paper is to develop a suitable statistical procedure to evaluate clean-up standards athazardous waste sites.Under the assumptions that contaminant masses at a site follow a gammadistribution and that the data from the pre-remediation baseline sample as well as from the interim orfinal sample taken after a certain period of operation are both distributed as gamma with the same shapeparameter but different scale parameters,we derive a uniformly most powerful unbiased test of thehypothesis that a specified percentage of contaminant mass has been reduced.A large-sampleapproximation of the exact test procedure and a comparison with the likelihood ratio test are provided.
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A STATISTICAL PROCEDURE TO EVALUATE CLEAN-UP STANDARDS |
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| ROBERT O''BRIEN BIMAL K.SINHA WILLIAM P.SMITH Statistical Policy Branch,Environmental Protection Agency,M St.,SW,Washington,DC,U.S.A..A STATISTICAL PROCEDURE TO EVALUATE CLEAN-UP STANDARDS[J].Journal of Geographical Sciences,1991(3). |
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| Authors: | ROBERT O'BRIEN BIMAL KSINHA WILLIAM PSMITH Statistical Policy Branch Environmental Protection Agency M St SW Washington DC USA |
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| Abstract: | The object of this paper is to develop a suitable statistical procedure to evaluate clean-up standards at hazardous waste sites.Under the assumptions that contaminant masses at a site follow a gamma distribution and that the data from the pre-remediation baseline sample as well as from the interim or final sample taken after a certain period of operation are both distributed as gamma with the same shape parameter but different scale parameters,we derive a uniformly most powerful unbiased test of the hypothesis that a specified percentage of contaminant mass has been reduced.A large-sample approximation of the exact test procedure and a comparison with the likelihood ratio test are provided. |
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| Keywords: | Asymptotic power Clean-up standard Gamma distribution Likelihood ratio test Uniformly most powerful unbiased test |
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