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standard deviation of sample

См. также в других словарях:

  • 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

  • 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 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 — /ˌstændəd di:vi eɪʃ(ə)n/ noun the way in which the results of a sample deviate from the mean or average …   Marketing dictionary in english

  • standard deviation — /ˌstændəd di:vi eɪʃ(ə)n/ noun the way in which the results of a sample deviate from the mean or average …   Dictionary of banking and finance

  • Unbiased estimation of standard deviation — In statistics, the standard deviation is often estimated from a random sample drawn from the population. The most common measure used is the sample standard deviation , which is defined by:s = sqrt{frac{1}{n 1} sum {i=1}^n (x i… …   Wikipedia

  • 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

  • Geometric standard deviation — In probability theory and statistics, the geometric standard deviation describes how spread out are a set of numbers whose preferred average is the geometric mean. If the geometric mean of a set of numbers { A 1, A 2, ..., A n } is denoted as μ g …   Wikipedia

  • Sample size determination — is the act of choosing the number of observations to include in a statistical sample. The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. In practice, the sample …   Wikipedia

  • Sample mean and sample covariance — are statistics computed from a collection of data, thought of as being random.ample mean and covarianceGiven a random sample extstyle mathbf{x} {1},ldots,mathbf{x} {N} from an extstyle n dimensional random variable extstyle mathbf{X} (i.e.,… …   Wikipedia

  • standard error — n. 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… …   English World dictionary

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