绘制均值-极差(或均值-标准差)控制图时,确定合理的子组的原则是()。
A.子组数量应该在5以下
B.组内差异只由随机变异造成
C.组内差异应大于组间差异
D.不存在组内差异
- · 有4位网友选择 C,占比50%
- · 有2位网友选择 D,占比25%
- · 有1位网友选择 B,占比12.5%
- · 有1位网友选择 A,占比12.5%
A.子组数量应该在5以下
B.组内差异只由随机变异造成
C.组内差异应大于组间差异
D.不存在组内差异
B过程中心与规格中心是否发生偏移
C与规格要求对比,判断过程能力是否充分
D是否有不合格品产生
A、均值-标准差控制图
B、均值-极差控制图
C、中值数-极差控制图
D、以上选项都正确
B、母体是选定的100名员工;样本是身高
C、母体是某厂区全部员工;样本是被选定的100名员工
D、以上皆非
W: Let me check it for you. Just a moment, please. NYSE is presently 32. 65 bid, 32. 72 asked, last trade at 32. 68 up a nickel. Volume is 12, 500. The Dow is down 33 points. 1, 000 are offered at 32. 72 and another 500 at 32. 75.
M: Please buy 2, 500 D&M at 32. 70 with 10 cents discretion good for today only.
W: OK, I have got it. I will call you as soon as we have a fill.
Where does this conversation take place?
A.In a supermarket
B.In a bank
C.At a stock exchange
D.At a trade fair
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