t检验SPSS有答案PPT学习教案

1、会计学1t检验检验SPSS有答案有答案第1页/共47页第2页/共47页第3页/共47页第4页/共47页第5页/共47页第6页/共47页第7页/共47页第8页/共47页检验结果：检验结果：t=7.003 ，P=0.0000.05,差异具有统计学意义差异具有统计学意义 。因为。因为慢性气管炎患者乙酰胆碱酯酶水平为，正常人为，可认慢性气管炎患者乙酰胆碱酯酶水平为，正常人为，可认为患者乙酰胆碱水平高于正常人。为患者乙酰胆碱水平高于正常人。第9页/共47页第10页/共47页第11页/共47页第12页/共47页第13页/共47页第14页/共47页第15页/共47页第16页/共47页第17页/共47页变量s

2、tandard 、new 的P分别为：0.919 和0.942,可认为近似正态分布。（P值，.表示符合正态性，.表示不符合正态性）第18页/共47页第19页/共47页第20页/共47页Paired Samples Statistics12.0417122.39752.692108.7917122.50870.72420STANDARDNEWPair 1MeanNStd. DeviationStd. ErrorMean单变量的统计描述Paired Samples Correlations12.485.110STANDARD & NEWPair 1NCorrelationSig.两变量的相

3、关系数,本例为0.485,P=0.110,无相关关系第21页/共47页统计量 t双侧配对t检验的P值差异有统计学意义配对变量差值的t检验结果第22页/共47页第23页/共47页第24页/共47页 患者编号患者编号 X X1 1 健康者编号健康者编号 X X2 2 5 6.53 5 1.98 9 4.32 9 4.57 12 4.17 第25页/共47页第26页/共47页建立数据库第27页/共47页文件分割文件分割选择DataSplit FileCompare groups把“Group”调入“Groups Based on”下，OK。第28页/共47页AnalyzeNonparametric

4、Tests1-Sample K-S将变量GS移入Test Variable List框内；在Test Distribution中激活“Normal”。单击OK按钮。则得出输出结果。第29页/共47页One-Sample Kolmogorov-Smirnov Test1215.20834.02164.121.121-.090.419.9951310.84624.22150.204.204-.112.735.652NMeanStd. DeviationNormal Parametersa,bAbsolutePositiveNegativeMost ExtremeDifferencesKolmogo

5、rov-Smirnov ZAsymp. Sig. (2-tailed)NMeanStd. DeviationNormal Parametersa,bAbsolutePositiveNegativeMost ExtremeDifferencesKolmogorov-Smirnov ZAsymp. Sig. (2-tailed)GROUP1.002.00GSTest distribution is Normal.a. Calculated from data.b. 第30页/共47页第31页/共47页DataSplit File 第32页/共47页Analyze all cases, do not

6、 create groupsOK。回到SPSS主画面第33页/共47页选择AnalyzeCompare MeansIndependent-sample T Test的主对话框。第34页/共47页第35页/共47页第36页/共47页Group Statistics1215.20834.021641.160951310.84624.221501.17083GROUP1.002.00GSNMeanStd. DeviationStd. ErrorMeanIndependent Samples Test.283.6002.64023.0154.36221.65217.944417.779952.6462

7、2.972.0144.36221.64883.951087.77328Equal variances assumedEqual variances notassumedGSFSig.Levenes Test forEquality of VariancestdfSig. (2-tailed)MeanDifferenceStd. ErrorDifferenceLowerUpper95% ConfidenceInterval of theDifferencet-test for Equality of Means方差齐性检验两个独立样本均数的t检验 双侧的P值,该差异具有统计学意义.第37页/共4

8、7页第38页/共47页第39页/共47页第40页/共47页G Gr ro ou up p S St ta at ti is st ti ic cs s127.1842.85984.24821127.1108.78008.22519组别1.002.00血清胆固醇NMeanStd. DeviationStd. ErrorMeanIndependent Samples TestIndependent Samples Test.344.564.21922.829.07333.33514-.62171.76837.21921.795.829.07333.33514-.62209.76875Equal v

9、ariancesassumedEqual variancesnot assumed血清胆固醇FSig.Levenes Test forEquality of VariancestdfSig. (2-tailed)MeanDifferenceStd. ErrorDifferenceLowerUpper95% ConfidenceInterval of theDifferencet-test for Equality of Means第41页/共47页Group StatisticsGroup Statistics127.1842.85984.24821126.6250.92709.26763实验

10、前后.001.00血清胆固醇NMeanStd. DeviationStd. ErrorMeanIndependent Samples TestIndependent Samples Test.057.8141.53222.140.55917.36501-.197821.316161.53221.876.140.55917.36501-.198071.31641Equal variancesassumedEqual variancesnot assumed血清胆固醇FSig.Levenes Test forEquality of VariancestdfSig. (2-tailed)MeanDi

11、fferenceStd. ErrorDifferenceLowerUpper95% ConfidenceInterval of theDifferencet-test for Equality of Means第42页/共47页Group StatisticsGroup Statistics127.1108.78008.22519126.9642.74990.21648实验前后.001.00血清胆固醇NMeanStd. DeviationStd. ErrorMeanI In nd de ep pe en nd de en nt t S Sa am mp pl le es s T Te es s

12、t t.061.808.47022.643.14667.31237-.50114.79447.47021.966.643.14667.31237-.50120.79453Equal variancesassumedEqual variancesnot assumed血清胆固醇FSig.Levenes Test forEquality of VariancestdfSig. (2-tailed)MeanDifferenceStd. ErrorDifferenceLowerUpper95% ConfidenceInterval of theDifferencet-test for Equality

13、 of Means以上对甲乙组，分别用以上对甲乙组，分别用T-test是错误的！是错误的！应该使用配对应该使用配对T-test！第43页/共47页O On ne e- -S Sa am mp pl le e K Ko ol lm mo og go or ro ov v- -S Sm mi ir rn no ov v T Te es st t12127.18426.6250.85984.92709.195.167.195.157-.106-.167.676.578.751.892NMeanStd. DeviationNormal Parametersa,bAbsolutePositiveNega

14、tiveMost ExtremeDifferencesKolmogorov-Smirnov ZAsymp. Sig. (2-tailed)实验前试验后Test distribution is Normal.a. Calculated from data.b. P Pa ai ir re ed d S Sa am mp pl le es s T Te es st t.55917.61095.17637.17099.947353.17011.009实验前 - 试验后Pair 1MeanStd. DeviationStd. ErrorMeanLowerUpper95% ConfidenceInter

15、val of theDifferencePaired DifferencestdfSig. (2-tailed)第44页/共47页One-Sample Kolmogorov-Smirnov TestOne-Sample Kolmogorov-Smirnov Test12127.11086.9642.78008.74990.306.268.306.268-.181-.2061.062.929.210.354NMeanStd. DeviationNormal Parametersa,bAbsolutePositiveNegativeMost ExtremeDifferencesKolmogorov

16、-Smirnov ZAsymp. Sig. (2-tailed)实验前试验后Test distribution is Normal.a. Calculated from data.b. P Pa ai ir re ed d S Sa am mp pl le es s T Te es st t.14667.21073.06083.01278.280562.41111.035实验前 - 试验后Pair 1MeanStd. DeviationStd. ErrorMeanLowerUpper95% ConfidenceInterval of theDifferencePaired DifferencestdfSig. (2-tailed)第45页/共47页G Gr ro ou up p S St ta at ti is st ti ic cs s12-.5592.61095.1763712-.1467.21073.06083组别1.002.00降胆NMeanStd. DeviationStd. ErrorMeanIndependent Samples TestIndependent Samples Test5.072.035-2.21122.038-.41250.18656-.79941-.02559-2.2111