作者chrisjon (研究布丁狗)
看板Statistics
标题Re: [问题] 统计的计算
时间Wed Jan 17 22:59:15 2007
※ 引述《post00712 (╮(﹀_﹀")╭)》之铭言:
: Based on past experience, it is assumed that the number
: of flaws per foot in rolls of grade 2 paper follows a Poisson
: distribution with an average of 1 flaw per 5 feet of paper
: (0.2 flaw per foot). what is the probability that in a
: question
: a. 1-foot roll there will be at least 2 flaws?
: b. 12-foot roll there will be at least 1 flaw?
: c. 50-foot roll there will be between 5 and 15 (inclusive) flaws?
: 希望能把这两题算式都列出来
: 感谢
平均每foot有0.2的flaws
a.1-foot出现最少2flaws的机率
b.12-foot出现最少1flaw的机率
c.50-foot出现5到15flaws的机率(包含5和15)
这题题目简化应该就是这样了,接下来应该很简单
别问我foot和flaw是什麽,我也不知道
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棒球队棒球队的坚强阵容
谁在一垒,什麽在二垒,三垒我不知道
今天当补手,明天在投球
为什麽在左外野,因为他在中外野
我不管啦是游击手,天啊他是裁判
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