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- 2011-7-11
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- 2013-8-21
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you want to see how far away your sample stat is from your mean... (in terms of standard deviations).
(x-mu)/sigma is giving you in terms of distance of the standard deviations how far away your sample statistic is from the mean of your population... and then you decide if that is statistically significant, or is just a passing aberration.
CP |
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发表于 2011-7-11 20:10
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