standard errorstandard error
Standard error is a statistical term that is defined as the measurement of the accuracy of an estimate, determined by comparing the estimate against the mean or typical amount.
An example of a standard error is a 1" standard error compiled by comparing the 3" measurement of the estimated height of a group of insects to the 2" mean height typically seen for those insects.
Statistics a measure of the dispersion in the distribution of differences between expected and observed values of a statistic: the standard error of the mean is equal to the standard deviation of the original frequency distribution divided by the square root of the sample size
A generalized notion of standard deviation, used to characterize the dispersion of a statistic (such as the sample mean) calculated from randomly sampled data.