1、0d12XX0d120XXSddS1212XXXXS221nn0X22121211222212121 1nXXtnSSnn22, 2/2, 2/22/212211XXXXSStStSt分分 组组 n X S 对对 照照 组组 20 1.46 1.36 试试 验验 组组 20 1.13 0.70 22121.461.13 0.965, 1.360.70202020119, 20119ttt0.05/2,19=2.093220.05/2221.360.702.0932.09320202.0931.360.702020t1121222212222121244222222121212121212()(
2、), ()()1111XXXXSSSSXXnnttSSSSSSnnnnnnnn22222221.360.70()202028.41.360.70(202020 120 1（）1212222122221244222212121212()(), 22()()1111XXXXSSSSnnttSSSSnnnnnn22222221.360.70()2020229.41.360.70(2020201201（）1111gggu2222gggu1g2g121g2g102020101110.599gggu2220.231gggu110.1445,0.2414gg220.1104,0.4783gg211122221() 1()nSFnS较 大较 小2221222122123.06011.598,2.420520 119, 20 119F 小结小结一、假设检验：假设、一、假设检验：假设、 型、 型错误二、二、t检验检验三、正态性检验三、正态性检验
