The exact question is this: 100 people visit this forum

来源: bearsback 于 2009-12-06 18:42:45 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (102 bytes)
本帖于 2009-12-10 08:06:15 时间, 由版主 林贝卡 编辑
回答: 手感很好KAWAI cn290, weighted key, 新的. 由 小谋 于 2009-12-06 17:59:23

everyday. Each person clicks 100 times a day.
What is the standard deviation of clicks for one day?

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• After you answer the above question, here comes a related -bearsback- ♂ 给 bearsback 发送悄悄话 bearsback 的博客首页 (162 bytes) () 12/06/2009 postreply 19:07:30

• 我也想搞清楚：什么是standard deviation? 我的书上都 -not.me- ♀ 给 not.me 发送悄悄话 not.me 的博客首页 (54 bytes) () 12/06/2009 postreply 19:23:48

• standard deviation 很难。我一直没搞懂。 -bearsback- ♂ 给 bearsback 发送悄悄话 bearsback 的博客首页 (69 bytes) () 12/06/2009 postreply 20:16:32

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