How do you calculate a standard deviation of mean?

To calculate the standard deviation of the mean (often referred to as the standard error of the mean), you first compute the standard deviation of your sample data. Then, divide this standard deviation by the square root of the sample size (n). The formula is: Standard Error (SE) = Standard Deviation (σ) / √n. This value gives you an estimate of how much the sample mean is expected to vary from the true population mean.