六西格玛黑带试题求助
求计算过程设原材料高度服从X~N(0.8,0.01²)(这里说了Z0.95=1.65,应该还是服从正态分布),则Y=3X~N(2.4,0.01²*3),μ=2.4,σ=3*0.01²的开方=0.1732。
Z=(Y-μ)/σ,Y(α=0.05)=2.4286约等于2.43.
个人理解,仅供参考。 :lol:lol 左手写失落 发表于 2019-6-27 13:57
设原材料高度服从X~N(0.8,0.01²)(这里说了Z0.95=1.65,应该还是服从正态分布),则Y=3X~N(2.4,0.01² ...
收到,多谢! :Q :Q 看不懂 :Q 左手写失落 发表于 2019-6-27 13:57
设原材料高度服从X~N(0.8,0.01²)(这里说了Z0.95=1.65,应该还是服从正态分布),则Y=3X~N(2.4,0.01² ...
分析得不错 :Q
页:
[1]
2