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问题 单项选择题

测得某批电阻中五个样品的电阻值为8.1，8.0，8.0，8.1，8.2，则

总体方差估计=()。

A．(0.161)2

B．(0.087)2

C．(0.157)2

D．(0.203)2

答案

参考答案：B

解析：

总体方差估计s2=(0.087)2。

单项选择题

John Maginn, an investment researcher, who is a CFA charter holder, takes a trip for which his firm will pay all the expenses. Upon his return he alters some of the numbers on restaurant receipts to inflate the expenses by $ 52. Is this a violation relating to Professional Misconduct（）

A. No, because the expense inflated is under $100.

B. No, if such behavior is not significant.

C. Yes, because it is a crime of moral turpitude.
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填空题

在磨合期内应尽量避免（）。
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