Remember that the mean of the sample mean is just the mean of the original data (μ¯x=μ ), but the standard deviation of the sample mean, σ¯x, also known as t...Remember that the mean of the sample mean is just the mean of the original data (μ¯x=μ ), but the standard deviation of the sample mean, σ¯x, also known as the standard error of the mean, is actually σ¯x=σ√n.