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Shoney

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SD: standard deviation
SEM: standard error of the mean
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Shoney: ½ð±Ò+1 2012-06-21 10:52:50
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4Â¥2012-06-21 09:02:34
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amisking: ½ð±Ò+2, ¹ÄÀø·¢Ìû°ïÖú½â´ðÎÊÌâ¡£ 2012-06-20 20:38:26
Shoney: ½ð±Ò+1 2012-06-21 10:52:43
The standard error is the standard
deviation of the sampling
distribution of a statistic . [1] The
term may also be used to refer to
an estimate of that standard
deviation, derived from a particular
sample used to compute the
estimate.
For example, the sample mean is
the usual estimator of a population
mean. However, different samples
drawn from that same population
would in general have different
values of the sample mean. The
standard error of the mean (i.e., of
using the sample mean as a
method of estimating the
population mean) is the standard
deviation of those sample means
over all possible samples (of a
given size) drawn from the
population. Secondly, the standard
error of the mean can refer to an
estimate of that standard
deviation, computed from the
sample of data being analyzed at
the time.
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[ ·¢×ÔÊÖ»ú°æ http://muchong.com/3g ]
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2Â¥2012-06-20 18:09:28
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Shoney

ľ³æ (ÖøÃûдÊÖ)

ÒýÓûØÌû:
2Â¥: Originally posted by ºïÆÕ·ò¶û at 2012-06-20 18:09:28
The standard error is the standard
deviation of the sampling
distribution of a statistic .  The
term may also be used to refer to
an estimate of that standard
deviation, derived from a particula ...

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