某厂生产的直柄麻花钻尺寸规格为$$\Phi 6_{0}^{+0.054} \mathrm{~mm}$$,今测得 100 个麻花钻直径数据如下表。已知当n=5时可查得A2=0.557,D4=2.115,D3不考虑(当n=5时,D₃为负)。请计算$$\bar{X}-R$$控制图的控制中心限和控制上下限。
$$\begin{array}{|l|l|l|l|l|l|l|l|l|l|l|l|}\hline 样本 & \mathrm{X}_{1} & \mathrm{X}_{2} & \mathrm{X}_{3} & \mathrm{X}_{4} & X_{5} & 样本 & X_{1} & \mathrm{X}_{2} & \mathrm{X}_{3} & \mathrm{X}_{4} & \mathrm{X}_{5} \\\hline 1 & 5.982 & 5.979 & 5.987 & 5.978 & 5.985 & 11 & 5.980 & 5.987 & 5.978 & 5.982 & 5.986 \\\hline 2 & 5.985 & 5.979 & 5.987 & 5.981 & 5.978 & 12 & 5.982 & 5.988 & 5.977 & 5.985 & 5.979 \\\hline 3 & 5.981 & 5.977 & 5.984 & 5.980 & 5.989 & 13 & 5.985 & 5.977 & 5.976 & 5.980 & 5.977 \\\hline 4 & 5.985 & 5.982 & 5.988 & 5.980 & 5.982 & 14 & 5.987 & 5.977 & 5.979 & 5.985 & 5.982 \\\hline 5 & 5.981 & 5.979 & 5.983 & 5.977 & 5.986 & 15 & 5.983 & 5.987 & 5.982 & 5.980 & 5.989 \\\hline 6 & 5.987 & 5.983 & 5.982 & 5.979 & 5.990 & 16 & 5.975 & 5.977 & 5.985 & 5.983 & 5.981 \\\hline 7 & 5.981 & 5.979 & 5.982 & 5.977 & 5.987 & 17 & 5.981 & 5.977 & 5.986 & 5.982 & 5.985 \\\hline 8 & 5.976 & 5.975 & 5.984 & 5.982 & 5.980 & 18 & 5.977 & 5.978 & 5.981 & 5.985 & 5.977 \\\hline 9 & 5.981 & 5.979 & 5.976 & 5.974 & 5.984 & 19 & 5.986 & 5.982 & 5.984 & 5.988 & 5.987 \\\hline 10 & 5.982 & 5.983 & 5.985 & 5.979 & 5.977 & 20 & 5.980 & 5.985 & 5.982 & 5.986 & 5.977 \\\hline\end{array}$$