实验六 平均值与标准差控制图实验实验目的：根据例 10.5.2 中的数据，用 SPSS 制作平均值与标准差控制图实验步骤：生成平均值与标准差控制图的关键是计算平均值与标准差。在 SPSS 中，可以利用“描述”命令来计算序列的平均值与标准差，然后选择“图形”菜单下的制图命令生成相应的图即可。步骤 1：输入和准备数据。步骤 2：选择“分析/统计描述/描述”命令，计算均值和标准差，得如表 7.1 所示数据。表 7.1 X−S 控制图数据计算表组号测定值xisixi1xi2xi3xi4xi5176.4276.5476.4576.5776.376.460.1069 276.4176.3576.4476.2976.4776.390.0722 376.2176.5476.2976.2176.2676.300.1374 476.4876.3976.3976.5276.6976.490.1234 576.3976.2276.5676.3676.4776.400.1271 676.4676.2176.4776.4276.4976.410.1147 776.2376.4276.3676.2676.4176.340.0868 876.276.4876.4676.5476.4276.420.1304 976.4776.3876.4676.3776.3176.400.0669 1076.4176.3576.3676.5676.4876.430.0881 1176.5576.3976.5176.4276.2976.430.1026 1276.4376.4276.3576.3676.4276.400.0378 1376.4876.2976.2376.2576.5876.370.1553 1476.4976.2376.4376.4776.4176.410.1033 1576.276.5176.3476.5176.3676.380.1305 1676.1976.4376.3476.376.4376.340.1003 1776.4876.3976.3176.5376.5176.440.0921 1876.2376.4676.5976.376.3976.390.1401 1976.4676.3176.476.3676.5876.420.1040 2076.4276.2376.3976.4876.5176.410.1092 2176.5276.6376.6276.3676.3576.500.1358 2276.3176.3976.2676.9276.3176.440.2734 2376.5876.3976.5276.4376.3276.450.1033 2476.3276.4376.6576.3976.3876.430.1270 2576.4576.5376.2676.3976.3376.390.1045 平均值76.410.1149 步骤 3：查X−S 控制图系数表，得控制界限。步骤 4：整理均值数据和方差数据，形成序列，选择“图形/线图”，生成如图 7.1 的均值控制图和 7.2 所示的标准差控制图。图 7.1 均值控制图图 7.2 方差控制图76.276.2576.376.3576.476.4576.576.5576.612345678910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25UCL=76.57CL=76.41LCL=76.2500.050.10.150.20.250.3123 45678 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25UCL=0.24CL=0.1149 S
