The exact question is this: 100 people visit this forum

來源: bearsback 於 2009-12-06 18:42:45 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (102 bytes)
本帖於 2009-12-10 08:06:15 時間, 由版主 林貝卡 編輯
回答: 手感很好KAWAI cn290, weighted key, 新的. 由 小謀 於 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- ♂ 給 bearsback 發送悄悄話 bearsback 的博客首頁 (162 bytes) () 12/06/2009 postreply 19:07:30

• 我也想搞清楚：什麽是standard deviation? 我的書上都 -not.me- ♀ 給 not.me 發送悄悄話 not.me 的博客首頁 (54 bytes) () 12/06/2009 postreply 19:23:48

• standard deviation 很難。我一直沒搞懂。 -bearsback- ♂ 給 bearsback 發送悄悄話 bearsback 的博客首頁 (69 bytes) () 12/06/2009 postreply 20:16:32

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