1、参数估计参数估计假设检验假设检验统计方法统计方法描述统计描述统计推断统计推断统计估估 计计 方方 法法点点 估估 计计区间估计区间估计112.5101.0103.0102.0100.5102.6107.595.0108.8115.6100.0123.5102.0101.6102.2116.695.497.8108.6105.0136.8102.8101.598.493.323353927364436424643313342534554472434283936444039493834485034394548453215101520148015001450148015101520148014901
2、53015101460146014701470112.5101.0103.0102.0100.5102.6107.595.0108.8115.6100.0123.5102.0101.6102.2116.695.497.8108.6105.0136.8102.8101.598.493.3401.12)24()1(2975.0212n364.39)24()1(2025.022n 总体总体1 总体总体2抽取简单随机样抽取简单随机样样本容量样本容量 n1计算计算X1抽取简单随机样抽取简单随机样样本容量样本容量 n2计算计算X2计算每一对样本计算每一对样本的的X1-X2所有可能样本所有可能样本的的X1-
3、X2m m1 1 m m2 2中学中学1中学中学2n1=46n1=33S1=5.8 S2=57.2861x782x方法方法1方法方法228.336.027.631.730.137.222.226.029.038.531.032.037.634.433.831.232.128.020.033.428.830.030.226.51222221121212222121nnSnnSnSnSv方法方法1方法方法228.336.027.631.730.137.222.226.529.038.531.037.634.433.832.128.020.028.830.030.2学生编号学生编号试卷试卷A试卷试卷B差值差值d17871726344193726111489845691741754951-27685513876601698577810553916
