spss练习.doc

《spss练习.doc》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、第十一章：连续变量的统计推断（一）------------T检验练习一，样本均数与总体均数的比较直径12.312.812.412.112.7从一批木头里抽取5根，测得直径如下，是否认为这批木头的平均直径是12.3cmOne-SampleStatisticsNMeanStd.DeviationStd.ErrorMean直径512.460.2881.1288One-SampleTestTestValue=12.3tdfSig.(2-tailed)MeanDifference95%ConfidenceIntervaloftheDifferenceLowerUppe

2、r直径1.2424.282.1600-.198.518由上表知总体均数为12.3，T=1.242，P值为0.282可知,由于P值元大于检验水平0.05，因此不拒绝H0，还不能认为样本所在的均数与假设的总体均数不同，即可认为这批木头的直径为12.3.。二，成组设计两样本均数的比较如比较两电子器材的电阻，随机出去的样本测量电阻，是比较两电子器材的电阻是否相同。A批0.1400.1380.1430.1420.1440.1480.137B批0.1350.1400.1420.1360.1380.1400.141GroupStatistics批类NMeanStd.Dev

3、iationStd.ErrorMean电阻A批7.14171.003773.001426B批7.13886.002610.000986IdependentSamplesTestLevene'sTestforEqualityofVariancesFSig.电阻.652568.435IIdependentSamplesTestt-testforEqualityofMeanSigMeanStd.errorTdf(2-tailed)DifferenceDifference电阻Equalvariancesassumed1.64812.1250.0028570.0017

4、34Equalvariancesnotassumed1.64810.67110.6710.0028570.001734由上表知：t=1.648，v=12，P=0.125.则P>0.05,故接受H0，认为两者的电阻值是相同的三，适应条件与方差齐性检验批类CaseProcessingSummary批类CasesValidMissingTotalNPercentNPercentNPercent电阻A批7100.0%0.0%7100.0%B批7100.0%0.0%7100.0%Descriptives批类StatisticStd.Error电阻A批Mean.1417

5、1.00142695%ConfidenceIntervalforMeanLowerBound.13822UpperBound.145205%TrimmedMean.14163Median.14200Variance.000Std.Deviation.003773Minimum.137Maximum.148Range.011InterquartileRange.006Skewness.440.794Kurtosis-.1421.587B批Mean.13886.00098695%ConfidenceIntervalforMeanLowerBound.13644U

6、pperBound.141275%TrimmedMean.13890Median.14000Variance.000Std.Deviation.002610Minimum.135Maximum.142Range.007InterquartileRange.005Skewness-.492.794Kurtosis-1.2681.587电阻Stem-and-Leaf Plots电阻 Stem-and-Leaf Plot for批类= A批 Frequency    Stem &  Leaf     2.00       13 .  78     4.00    

7、   14 .  0234     1.00       14 .  8 Stem width:      .010 Each leaf:       1 case(s)电阻 Stem-and-Leaf Plot for批类= B批 Frequency    Stem &  Leaf      .00       13 .     3.00       13 .  568     4.00       14 .  0012 Stem width:      .010 Each leaf:       1 case(s)四，配对设计样本均数的比较如为研究女性服

8、用某避孕新药后是否影响其血清总胆固醇，讲20名女性按