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ScoreTablechartvaluecorrespondstoareabelowzscoreTableentryTableentryforzistheareaunderthestandardnormalcurvetotheleftofz*Forvalues ofz≥,theareasaretofourimalplaces.TheanimationaboveshowstheshapeoftheChi-squareNOTE:Forvaluesofzabove,useforthearea.StandardNormal Probabilitieszz–––––––––––––––––––––––––––––––CreatedDate/1/PM*Usethesecommonvaluesthatresultfrominterpolation:z scoreArea**zCommonPositiveZTableZ0CumulativeprobabilitiesforNEGATIVEz-valuesareshowninthefollowingtableAZScorecanbeeitherpositive ornegativedependingonwhetherthescoreliesabovethemean(inwhichcaseitispositive)orbelowthemean(inwhichcaseitisnegative)ZScorehelpsus compareresultstothenormalpopulationormeanSTANDARDNORMALDISTRIBUTION:TableValuesRepresentAREAtotheLEFToftheZ scoreMicrosoftWordSTUZAuthor:DanaCreatedDateTableofStandardNormalProbabilitiesforNegativeZ-‐scorestwotailprobabilityz-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐MicrosoftWordZScoreTable.StandardNormalProbabilitieszz––––––––––Created Date/1/PMSecondimalplaceinz.Table&of&StandardNormal&Probabilities&for&Positive&Z6scores&&&&&&&&&z""""""""""""$$0Table entryTableentryforzistheareaunderthestandardnormalcurvetotheleftofzZscoretablealsocalledasstandardnormaltableisusedtodetermine correspondingareaorprobabilitytozscorevalueZ-scorevaluecanbezero,PositiveC:\DATA\StatPrimer\(12/11/03)ZTableEntriesinthebodyofthetable representsareasunderthecurvebetween!4andzzLiketheStudent'st-Distribution,theChi-squaredistribtuion'sshapeisdeterminedbyitsdegreesoffreedom
TableT:CriticalvaluesfortheStudent'sTdistributionsdfZScoreTable