The standard error of the mean is the standard deviation of the sampling distribution of $\bar { X }$ .

Name: The standard error of the mean is the standard deviation of the sampling distribution of $\bar { X }$ .
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The standard error of the mean measures how much the sample mean ($\bar { X }$) is expected to vary from the true population mean. It is indeed the standard deviation of the sampling distribution of the sample mean ($\bar { X }$).

The Standard Error of the Mean Is the Standard Deviation Xˉ\bar { X }Xˉ

The Standard Error of the Mean Is the Standard Deviation $\bar { X }$