A normal distribution question?

2011-11-21 5:52 am
An investment has an expected return of 10% with a standard deviation of 5%. If the returns are normally distributed, the chance of losing money is closet to:
A. 2.5%
B. 5.0%
C. 16.0%

Please give out detail explanation.

回答 (1)

2011-11-21 6:12 am
✔ 最佳答案
Pr(X<0) = Pr(Z<-2) = 2.5% , ans A


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