standard deviation of estimate of mean

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• Standard deviation — In probability and statistics, the standard deviation is a measure of the dispersion of a collection of values. It can apply to a probability distribution, a random variable, a population or a data set. The standard deviation is usually denoted… …   Wikipedia

• standard deviation — (in statistics) a measure of the scatter of observations about their arithmetic mean, which is calculated from the square root of the variance of the readings in the series. The arithmetic sum of the amounts by which each observation varies from… …   Medical dictionary

• standard deviation — (in statistics) a measure of the scatter of observations about their arithmetic mean, which is calculated from the square root of the variance of the readings in the series. The arithmetic sum of the amounts by which each observation varies from… …   The new mediacal dictionary

• Pooled standard deviation — In statistics, pooled standard deviation is a way to find an estimate of the population standard deviation given several different samples taken in different circumstances where the mean may vary between samples but the true standard deviation… …   Wikipedia

• sample standard deviation — an estimate of the population standard deviation, usually determined (from a sample of size n) by dividing the sum of the squared deviations from the sample mean by n−1 and taking the square root; n−1 is used (rather than n) in order… …   Medical dictionary

• Standard error (statistics) — For a value that is sampled with an unbiased normally distributed error, the above depicts the proportion of samples that would fall between 0, 1, 2, and 3 standard deviations above and below the actual value. The standard error is the standard… …   Wikipedia

• standard error — noun 1. : standard deviation 2. : standard deviation divided by the square root of the number of items in a sample tested : the standard deviation of the sample mean * * * ˌstandard ˈerror 7 [standard error] …   Useful english dictionary

• Mean squared error — In statistics, the mean squared error (MSE) of an estimator is one of many ways to quantify the difference between values implied by a kernel density estimator and the true values of the quantity being estimated. MSE is a risk function,… …   Wikipedia

• standard error of the mean — an indication of how well a sample mean estimates the population mean by measurement of the standard deviation of a sampling distribution of the means. It is approximately equal to where s is the sample estimate of the standard deviation and n is …   Medical dictionary

• Regression toward the mean — In statistics, regression toward the mean (also known as regression to the mean) is the phenomenon that if a variable is extreme on its first measurement, it will tend to be closer to the average on a second measurement, and a fact that may… …   Wikipedia

• Root-mean-square deviation — For the application of root mean square deviation to bioinformatics, see Root mean square deviation (bioinformatics). The root mean square deviation (RMSD) or root mean square error (RMSE) is a frequently used measure of the differences between… …   Wikipedia