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standard error/standard deviation
Message posted by des desouza on November 18, 1999 at 12:00 AM (ET)
Ok, this maybe a daft question, but could someone clarify for me the difference between standard deviation and standard error please.
Thanks
Des
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Re: standard error/standard deviation
Message posted by Jack Tomsky on November 18, 1999 at 12:00 AM (ET)
The standard error is the standard deviation of the estimator of a parameter. For example, if you estimate the population mean by the sample mean, xbar, the standard error of xbar is sigma/sqrt(N), where sigma is the standard devaition of a single obseervation and N is the sample size.
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