The standard deviation of is referred to as the​

A) ​standard mean of x.
B) ​standard error of the mean.
C) ​sample standard mean.
D) ​sample mean deviation.

Standard Error

The standard deviation of the sampling distribution of a statistic, often used to measure the accuracy of a sample mean.

Standard Deviation

A measure of the dispersion or variability of a dataset, representing the average distance between each data point and the mean.

Sample Mean

The average of all the data points in a sample taken from a population.