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/四川中学教育情况简析研究目的:通过对四川某中学2010学年年度成绩调查,粗略探讨四川中学现目前的国中教育情况.数据说明:数据取自四川某中学2010学年年度的平均成绩,共计440名学生.四川某中学2010学年年度成绩考号成绩考号成绩考号姓名考号成绩30101783033676306017430827763010281303377230602703082872301038030338783060384308297830104783033977306047630830773010587303406730605753083167301067730341763060669308327630107823034278306078030833783010881303436730608663083467301097930344643060971308356430110823034530306108130836303011180303469030611823083790301127830347673061278308386730113803034867306138130839673011481303497930614703084079301158230401673061584308416730116793040281306166430842813011780304039030617823084360301187830404873061879308448730119793040572306197630845723012083304068630620683084686301217930407763062173308477630122793040876306227830848763012383304097830623783084978301247830410753062476308507530125833041190306257830851903012678304128230626783090182301277830413803062790309028030128793041472306287430903723012979304158130629723090481301308630416793063070309057930131833041771306316730906713013279304188330632713090783301337830419783063378309087830134813042081306347030909813013576304216730635783091067301368230422843063666309118430137833042357306377830912573013882304248530638703091385302017630425763063979309147630202793042672306407530915723020370304278730641713091687302047430428953064276309179530205743042987306437630918873020671304307830644793091978302077730431763064576309207630208783043290306466730921703020974304337830647753092268302107530434733070186309237330211793043567307027230924673021265304366730703673092567302137130437763070480309267630214743043875307056730927753021573304397630706673092876302167530440763070783309297630217743044184307085630930843021874304427430709683093174302197630443613071071309326130220753044478307116830933783022168304457830712733093478302227230446673071387309356730223733050178307148730936783022483305026730715943093767302257330503783071676309387830226723050486307179830939663022770305056730718793094067302287530506753071987309417530229723050745307207830942453023068305086730721813094367302317230509643072267309446430232713051067307237630945673023374305117830724763100178302347230512683072569310026830235743051367307267831003673023672305147630727783100476302377230515763072867310057630301743051672307296831006723030278305177130730843100771303037730518713073175310087130304763051978307328731009783030576305207430733673101074303067830521733073485310117330307703052268307357331012683030873305237330736783101373303097230524783073778310147830310713052577308017131015773031173305267130802673101671303126630527783080380310177830313683052879308047031018793031472305297830805673101978303156730530663080667310206630316783053178308076431021783031776305327530808673102275303188030533753080967310237530319733053464308106731024643032072305358730811873102587303217830536763081284310267630322703053764308138331027643032374305387030814793102870303246730539673081567310296730325763054056308167231030563032673305417230817783103172303277030542653081873310326530328673054380308196531033803032974305448930820873103489303307230545903082187310359030331703054687308227331036673033268305476130823783103761303337230548633082466310386330334683054964308257631039643033572305508930826783104090实证研究:想对整个样本做描述性统计,检验是否符合正太分布,结果如下EmpiricalDistributionTestforAHypothesis:NormalDate:01/06/12Time:01:48Sample:1440Includedobservations:440MethodValue
Adj。ValueProbabilityLilliefors(D)0.066623NA0.0001Cramer—vonMises(W2)0.3698890.3703090。0001Watson(U2)0.3547070.3551100。0000Anderson-Darling(A2)2.4739732.4782180。0000Method:MaximumLikelihood-d.f.corrected(ExactSolution)ParameterValue
Std.Errorz—StatisticProb.
MU74.422730。351043212。00440.0000SIGMA7。3635460.24850829.631060.0000Loglikelihood-1502。311
Meandependentvar.74.42273No。ofCoefficients2
S。D.dependentvar。7。363546ﻫ可以看出,样本总体是成正太分布的。将数据等分成2组样本,前220组数据为一组,计为OBJ1,后220组数据位一组,计为OBJ2。分别用描述性检验检验是否为正太分布,结果如下EmpiricalDistributionTestforOBJ1Hypothesis:NormalDate:01/06/12Time:01:52Sample:1220Includedobservations:220MethodValue
Adj.ValueProbabilityLilliefors(D)0。086601NA0。0004Cramer-vonMises(W2)0.1903170。1907490.0071Watson(U2)0.1554220.1557750。0131Anderson-Darling(A2)1.2675051。2718850。0026Method:MaximumLikelihood—d.f.corrected(ExactSolution)ParameterValue
Std.Errorz-StatisticProb.
MU74。409090.422224176。23150.0000SIGMA6。2625880。29923820.928450。0000Loglikelihood—715。2771
Meandependentvar。74.40909No.ofCoefficients2
S。D.dependentvar。6.262588
EmpiricalDistributionTestforOBJ2Hypothesis:NormalDate:01/06/12Time:01:52Sample:1220Includedobservations:220MethodValue
Adj.ValueProbabilityLilliefors(D)0.084488NA0。0006Cramer—vonMises(W2)0.2917240.2923870.0004Watson(U2)0.2908140。2914750.0002Anderson—Darling(A2)1。9275181.9341790.0001Method:MaximumLikelihood—d。f。corrected(ExactSolution)ParameterValue
Std。Errorz-StatisticProb。
MU74.436360.561940132.46320.0000SIGMA8.3349160.39825820。928450.0000Loglikelihood-778。1662
Meandependentvar.74。43636No.ofCoefficients2
S。D.dependentvar。8.334916ﻫ可以看出,在显著性水平为5%的情况下,2个样本都是成正太分布的。对其样本均值做相等检验,结果如下。TestforEqualityofMeansBetweenSeriesDate:01/06/12Time:01:55Sample:1220Includedobservations:220MethoddfValueProbabilityt-test438-0。0388010。9691Satterthwaite-Welcht-test*406.5109—0.0388010.9691AnovaF-test(1,438)0.0015060.9691WelchF-test*(1,406.511)0.0015060.9691*TestallowsforunequalcellvariancesAnalysisofVarianceSourceofVariationdfSumofSq.MeanSq。Between10。0818180.081818Within43823803。2954.34541Total43923803.3754.22181CategoryStatisticsStd。Err.VariableCountMeanStd。Dev。ofMeanOBJ122074。409096.2625880。422224OBJ222074.436368。3349160.561940All44074。422737.3635460。351043ﻫ可以看出,P=0。9691,在α=1%、5%、10%情况下都可以认为两个样本均值都相等,其中OBJ1的均值为74.40909,OBJ2的均值为74。43636对其样本方差做相等检验,结果如下TestforEqualityofVariancesBetw
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