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1、试验设计与数据处理第三章：统计推断3-13解：取假设H0： u1-u20和假设H1： u1-u20用sas分析结果如下:Sample StatisticsGroupNMeanStd. Dev.Std. Errorx80.2318750.01460.0051y100.20970.00970.0031Hypothesis TestNull hypothesis:Mean 1 - Mean 2 = 0Alternative:Mean 1 - Mean 2 a= 0If Variances Aret statisticDfPr tEqual3.878160.0013Not Equal3.70411.6
2、70.0032由此可见p值远小于0.05,可认为拒绝原假设，即认为2个作家所写的小品文中 由3个字母组成的词的比例均值差异显著。3-14解：用sas分析如下：Hypothesis TestNull hypothesis:Variance 1 / Variance 2 = 1Alternative:Variance 1 / Variance 2 A= 1-Degrees of Freedom -FNumer. Denom.Pr F2.27790.2501由p值为0.2501 0.05 （显著性水平），所以接受原假设，两方差无显著差异第四章：方差分析和协方差分析4-1 解：Sas分析结果如下：De
3、pendent Variable: ySourceModelDF4Sum ofSquares Mean Square1480.823000370.205750F Value Pr F40.88 Fc41480.823000370.20575040.88 FModel1182.83333337.53030301.390.2895Error1265.00000005.4166667Corrected Total23147.8333333R-SquareCoeff VarRoot MSER Mean0.56031622.342782.32737310.41667SourceDFType I SSMe
4、an Square F Value Pr Fm244.3333333322.166666674.090.0442n311.500000003.833333330.710.5657m*n627.000000004.500000000.830.5684SourceDFType III SSMean Square F Value Pr Fm244.3333333322.166666674.090.0442n311.500000003.833333330.710.5657m*n627.000000004.500000000.830.5684由结果可知，在不同浓度下得率有显著差异，在不同温度下得率差异不
5、明显，交 互作用的效应不显著。4-4解：（1）不用协变量做方差分析The GLM ProcedureDependent Van able: ySimiofSourceDFSquaresMean SquareF ValuePrFModelErrorCorrected Total31041 791667347.263 S 891.3S20J01SH56667250.0833323Fy13300416&671.320 26501的3.3 方 00002.7601120118J 7500000070.7895SourceDFTyped SSMean SquareF ValuePrFV1 0041666
6、71J20 2650由分析结果可知，花的品种、温度和两者的交互作用对鲜花产量的影响都是不显著的。1ir 3 7500000070JS9J(2)引入协变量作万差分析TheGLM ProceduieDependent Variable: ySum ofSourceDFSquaresMean SquareF ValuePrFModel4832.7190861458.179772121.92Fy133004166727.1500001勇1693.3 烦。.57.970001118.3750001.5402303514790.927419400 58Fy123 9442812000.17331479.2
7、88S6D4007FModel315.645005.211J.1700119Error41375000.34375Corrected Total：7.02000RwtMSE0JS630R-Square09192Dependait Mean9900000.8586g 堀5.92224Parameter EstimatesParameter StandardVariableDFEstimateErrort ValueIntercept19900000207294?. 76FModel315.645003 21500111700119Error41375000.34375Correctsd Total7n .02000ParameterStandardVariableEstimateErrorTypeUSSF ValuePrFIntercept9.900000.20729784-080002280.960001057 JOO0207292.64:007.69O.OjOlOjjOOO0.207292.420007.0400j6Sx3.IL 50000.2072910. j 800030.780.0052Bounds on conditiDn miniber: 1. 9由分析结果可知，故所求方程为:
