科学计算_Wolf River Pollution(沃尔夫河污染数据)

WolfRiverPollution(沃尔夫河污染数据)数据摘要：Jaffe,ParkerandWilsonhaveinvestigatedtheconcentrationofseveralhydrophobicorganicsubstances(suchashexachlorobenzene,chlordane,heptachlor,aldrin,dieldrin,endrin)intheWolfRiverinTennessee.Measurementsweretakendownstreamofanabandoneddumpsitethathadpreviouslybeenusedbythepesticideindustrytodisposeofitswasteproducts.Itwasexpectedthatthesehydrophicsubstancesmighthaveanonhomogeneousverticaldistributionintheriverbecauseofdifferencesindensitybetweenthesecompoundsandwaterandbecauseoftheadsorptionofthesecompoundsonsediments,whichcouldleadtohigherconcentrationsonthebottom.Itisimportanttocheckthishypothesisbecausethestandardprocedureofsamplingatsix-tenthsofthedepthcouldmissthebulkofthesepollutantsifthedistributionwerenotuniform.GrabsamplesweretakenwithaLaMotte-Vandornwatersamplerof1litrecapacityatvariousdepthsoftheriver.Thissamplerconsistsofahorizontalplexiglastubeof7centimetresdiameterandaplungerofeachsidewhichshutsthesamplerwhenthesamplerisatthedesireddepth.Tensurface,10mid-depthand10bottomsampleswerecollected,allwithinarelativelyshortperiod.Untiltheywereanalysedthesampleswerestoredin1-quartmasonjarsatlowtemperature.Intheanalysisofthesamples,a250-millilitrewatersamplewastakenfromeachmasonjarandwasextractedwith1millilitreofeitherhexanesorpetroleumether.Asampleoftheextractwastheninjectedintoagaschromatographandtheoutputwascomparedagainststandardsofknownconcentrations.Thetestprocedurewasrepeatedtwomoretimes,injectingdifferentsamplesoftheextractinthegaschromatograph.Theaveragealdrinandhexachlorobenzene(HCB)concentrations(innanogramsperliter)inthese30samplesaregiveninthedata.中文关键词：相关,单因子方差分析,异常值,沃尔夫河,污染,英文关键词：correlation,one-wayanalysisofvariance,outliers,Wolfriver,pollution,数据格式：TEXT数据用途：Itcanbeusedforstatistics.数据详细介绍：WolfRiverPollutionKeywords:correlation,one-wayanalysisofvariance,outliers,analysisofcovarianceDescriptionJaffe,ParkerandWilsonhaveinvestigatedtheconcentrationofseveralhydrophobicorganicsubstances(suchashexachlorobenzene,chlordane,heptachlor,aldrin,dieldrin,endrin)intheWolfRiverinTennessee.Measurementsweretakendownstreamofanabandoneddumpsitethathadpreviouslybeenusedbythepesticideindustrytodisposeofitswasteproducts.Itwasexpectedthatthesehydrophicsubstancesmighthaveanonhomogeneousverticaldistributionintheriverbecauseofdifferencesindensitybetweenthesecompoundsandwaterandbecauseoftheadsorptionofthesecompoundsonsediments,whichcouldleadtohigherconcentrationsonthebottom.Itisimportanttocheckthishypothesisbecausethestandardprocedureofsamplingatsix-tenthsofthedepthcouldmissthebulkofthesepollutantsifthedistributionwerenotuniform.GrabsamplesweretakenwithaLaMotte-Vandornwatersamplerof1litrecapacityatvariousdepthsoftheriver.Thissamplerconsistsofahorizontalplexiglastubeof7centimetresdiameterandaplungerofeachsidewhichshutsthesamplerwhenthesamplerisatthedesireddepth.Tensurface,10mid-depthand10bottomsampleswerecollected,allwithinarelativelyshortperiod.Untiltheywereanalysedthesampleswerestoredin1-quartmasonjarsatlowtemperature.Intheanalysisofthesamples,a250-millilitrewatersamplewastakenfromeachmasonjarandwasextractedwith1millilitreofeitherhexanesorpetroleumether.Asampleoftheextractwastheninjectedintoagaschromatographandtheoutputwascomparedagainststandardsofknownconcentrations.Thetestprocedurewasrepeatedtwomoretimes,injectingdifferentsamplesoftheextractinthegaschromatograph.Theaveragealdrinandhexachlorobenzene(HCB)concentrations(innanogramsperliter)inthese30samplesaregiveninthedata.SourceJaffe,P.R.,Parker,F.L.,andWilson,D.J.(1982).Distributionoftoxicsubstancesinrivers.JournaloftheEnvironmentalEngineeringDivision,108,639-649.Hogg,R.V.,andLedolter,J.(1992).AppliedStatisticsforEngineersandPhysicalScientists.Macmillan,NewYork.Exercises1.4-3and1.5-1.AnalysisThereare3apparentoutliers.Aldrinconcentrationdoesincreasewithdepth.HCBmaydoalso,buttheeffectisnotsignificant.数据预览：点此下载完整数据集