正态分布拟合优度检验 组段组段组中值实际频数f2正态分布理论频数卡方分量 下限上限X 概率Px -T) 0.750.800.775 0.7750.6010.009021 0.800.850.825 2 16501.3610.027821 0.454 0.850.900.875 11.37599530.075840 9.1 0.900.950.92515 13.87512.8340.149640 18.0 0.487 0.951.000.975 25.35024.7160.213748 25.60.005 1.001.051.0 26 26.65027.3160.221060 26.50.010 1.051.101.07518 1935020.8010.165530 19.90.175 1.101.151.12515 1687518.9840.089735 10.81.663 1.151.201.1753 3.5254.1420.035212 4.2 0.513 1.20 1.200 1.2001.4400.012393 120120.625122.1491.000000 120.0 均数1.005 标准差0.087正态分布拟合优度检验 组段 下限 组段 上限 组中值 X 实际频数 f fx fx 2 正态分布 概率PX 理论频数 T 卡方分量 (f-T ) 2 /T 0.75 0.80 0.775 1 0.775 0.601 0.009021 1.1 0.80 0.85 0.825 2 1.650 1.361 0.027821 3.3 0.454 0.85 0.90 0.875 13 11.375 9.953 0.075840 9.1 0.90 0.95 0.925 15 13.875 12.834 0.149640 18.0 0.487 0.95 1.00 0.975 26 25.350 24.716 0.213748 25.6 0.005 1.00 1.05 1.025 26 26.650 27.316 0.221060 26.5 0.010 1.05 1.10 1.075 18 19.350 20.801 0.165530 19.9 0.175 1.10 1.15 1.125 15 16.875 18.984 0.089735 10.8 1.663 1.15 1.20 1.175 3 3.525 4.142 0.035212 4.2 0.513 1.20 1.200 1 1.200 1.440 0.012393 1.5 合计 120 120.625 122.149 1.000000 120.0 3.308 均数 1.005 标准差 0.087