作者lenux (人生到处知何似)
看板Math
标题[机统] 骰子机率
时间Wed Jul 13 11:20:57 2011
题目如下
A die has been loaded to change the probability of rolling a 6. In order to
estimate ρ , the new probability of rolling a 6, how many times must the die
be rolled so that we are 99% confident that the maximum error of the estimate
of ρ is ε=0.02 ?
请问这题条件是否不足？
因为样本数的算法尚缺一个变异数
又这骰子已经是一个不公正的骰子(loaded to change the probability)
希望我没误会题目的意思
所以无从得知这不公正的骰子服从什麽分配
不知道怎麽求变异数
请教各位高手指点，谢谢
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