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LeBlanc

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10Â¥: Originally posted by zjxxcf at 2015-11-30 10:54:15
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11Â¥2015-11-30 10:59:14
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12Â¥2015-11-30 11:00:09
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jabile

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7Â¥: Originally posted by LeBlanc at 2015-11-30 10:47:36
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DX\leq E(X-a)^2
13Â¥2015-11-30 11:08:58
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4Â¥: Originally posted by zaq123321 at 2015-11-30 03:03:27
If c is correct, then a is correct. Usually there is some boundary for this case. Thus b and d are excluded

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