回复:想起了一个统计学上的趣题

来源: svll 2007-11-07 23:54:06 [] [旧帖] [给我悄悄话] 本文已被阅读: 0 次 (264 bytes)
Anyone does math or science for a living? Lao Zhou?

The answer for weather is unknown. For stock it is 71% x 70% + 29% x 50% = 0.642. 50% is based on random walk of the stock. If you draw a result tree with the probabilities, it helps you think about it.
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