推 kerota:(1084-562)/3=174 06/26 15:33
A control chart has a center line at 562 and 3 sigma control limits at 1084
and 40. Calculate the values for the sample mean and standard deviation.
答案_
mean 是 562
Sd 是 174
一直不懂SD怎嚜算出來的@@
誰可以幫我解釋一下嘛 感激不盡
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