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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * MINITAB:QC小组要确定此硬度测量系统的线性,选定5个零件,一位评价人,对每个零件测量12次,读数如表所示: 零件序号 1 2 3 4 5 试验次数 1 152.065 176.301 200.714 222.828 247.847 2 152.021 176.578 200.299 223.593 248.063 3 151.279 175.630 200.562 223.857 248.449 4 151.244 176.070 199.349 224.332 248.209 5 152.431 176.569 199.882 222.991 247.546 6 152.266 176.266 199.883 225.192 248.364 7 151.662 176.693 199.725 224.587 248.356 8 151.612 175.803 199.220 224.511 249.052 9 153.161 175.560 199.432 224.601 248.046 10 152.046 176.230 200.235 224.446 247.756 11 151.275 175.780 200.288 223.913 248.181 12 151.622 176.408 200.292 224.339 247.904 零件序号(基准值) 1(150) 2(175) 3(200) 4(225) 5(250) 零件平均值 151.890 176.157 199.990 224.099 248.148 基准值x 150 175 2