作者tmd39 (good luck)
看板Statistics
标题[问题] 关於random interval
时间Wed Feb 28 12:51:24 2007
Let x(x的上面有一条线)denote the mean of a random sample of size n from a
distribution that has mean u and variance 母体变异数(因为符号打不出来所以先
用中文打)=10.Find n so that the probability is approximately 0.954 that the
random interval( x(上面有一条线)-0.5,x(上面有一条线)+0.5)includes u.
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