试验设计与数据处理课后作业

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1、习题三3-7（1）金球SAS处理结果：SampleStatisticsforxNMeanStd.Dev.Std.Error-------------------------------------------------66.680.000.00HypothesisTestNullhypothesis:Meanofx=0Alternative:Meanofx^=0tStatisticDfProb>t---------------------------------4228.3445<.000190%ConfidenceIntervalfortheMeanLowerLimit:6.67Uppe

2、rLimit:6.68由运行结果可知，μ的置信度为0.9的置信区间（6.67，6.68）。SampleStatisticsforxNMeanStd.Dev.Variance---------------------------------------------66.67820.003915E-6HypothesisTestNullhypothesis:Varianceofx=1Alternative:Varianceofx^=1Chi-squareDfProb---------------------------------0.0005<.000190%ConfidenceInterval

3、fortheVarianceLowerLimitUpperLimit----------------------676E-80.0001由运行结果可知，σ2的置信度为0.9的置信区间（676E-8，0.0001）。（2）铂球SAS处理结果：SampleStatisticsforxNMeanStd.Dev.Std.Error-------------------------------------------------56.660.000.00HypothesisTestNullhypothesis:Meanofx=0Alternative:Meanofx^=0tStatisticDfPro

4、b>t---------------------------------4967.0524<.000190%ConfidenceIntervalfortheMeanLowerLimit:6.66UpperLimit:6.67由运行结果可知，μ置信度为0.9的的置信区间（6.66，6.67）。SampleStatisticsforxNMeanStd.Dev.Variance---------------------------------------------56.6640.0039E-6HypothesisTestNullhypothesis:Varianceofx=1Alternativ

5、e:Varianceofx^=1Chi-squareDfProb---------------------------------0.0004<.000190%ConfidenceIntervalfortheVarianceLowerLimitUpperLimit----------------------379E-8507E-7由运行结果可知，σ的置信度为0.9的置信区间（379E-8，507E-7）。3-10SAS处理结果：SampleStatisticsforxNMeanStd.Dev.Std.Error-----------------------------------------

6、--------53.250.010.01HypothesisTestNullhypothesis:Meanofx=3.25Alternative:Meanofx^=3.25tStatisticDfProb>t---------------------------------0.34340.7489说明：因为在t检验中，p-value值0.7489>0.01(显著性水平)，所以接受原假设，即这批矿砂的镍含量的均值为3.25。3-13SAS处理结果：SampleStatisticsGroupNMeanStd.Dev.Std.Error------------------------------

7、----------------------x80.2318750.01460.0051y100.20970.00970.0031HypothesisTestNullhypothesis:Mean1-Mean2=0Alternative:Mean1-Mean2^=0IfVariancesAretstatisticDfPr>t-------------------------------------------