12-14-2008, 11:02 PM
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Junior Member
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Join Date: Dec 2008
Posts: 1
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Standard Deviation Question
Hi,
In what situations should you use the sample standard deviation equation and in what situations should you use the population standard deviation equation?
Thanks.
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01-12-2009, 02:29 AM
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Junior Member
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Join Date: Jan 2009
Posts: 1
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09-02-2009, 02:47 PM
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Junior Member
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Join Date: Jul 2009
Posts: 21
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新加的空白文章37
这是新加的空白文章37，可以在ubb可视化编辑器中，添加和修改文章内容。
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07-12-2010, 11:10 AM
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Junior Member
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Join Date: Jul 2010
Posts: 10
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the standard deviation measures the spread of the data about the mean value. It is useful in comparing sets of data which may have the same mean but a different range. For example, the mean of the following two is the same: 15, 15, 15, 14, 16 and 2, 7, 14, 22, 30. However, the second is clearly more spread out. If a set has a low standard deviation, the values are not spread out too much.
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