为什么没有几何中间值这个概念?
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新语丝读书论坛
送交者: HunHunSheng 于 2008-03-05, 14:55:06:
arithmetic mean: u=sum xi/n
geometric mean: u=exp(sum log xi/n) = expt(arithmeati emean of log x)
arithmetic median: middle number or average of two middle number
But there is no such concept as geometric median
for teh above purpose.
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BerkeleyWolf
(662 bytes)
2008-03-05, 23:23:32
(210221)
maybe because mean is a "good" functoin while median is not. (无内容)
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008
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2008-03-05, 15:35:55
(210150)
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