作者sleepsoy (洪小义)
看板Grad-ProbAsk
标题[理工] [机率]-中央极限定理问题
时间Sun Jan 10 01:44:55 2010
Suppose that the scores of an exam with fifty thousand attendants have normal
distribution with the variance of 16, and 15.87% of the attendants have scores
less than 68 points. With the information of the Q-function below, you may use
interpolation to obtain the estimated value when necessary.
a.
What is the mean value of scores in this exam?
想请问板上的高手
mean的值要怎麽求...
谢谢QQ
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