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  1. Dictionary
    standard deviation

    noun

    • 1. a quantity expressing by how much the members of a group differ from the mean value for the group.

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  2. byjus.com › maths › standard-deviationStandard Deviation - Definition, How to calculate the variance...

    Learn what is standard deviation, a measure of how much variation exists in a data set, and how to calculate it using the formula. See examples of standard deviation for population and sample data, and how it differs from variance.

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  3. en.wikipedia.org › wiki › Standard_deviationStandard deviation - Wikipedia

    In statistics, the standard deviation is a measure of the amount of variation of a random variable expected about its mean. [1] . A low standard deviation indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range.

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  5. statisticsbyjim.com › basics › standard-deviationStandard Deviation: Interpretations and Calculations

    Learn what the standard deviation (SD) is, how it measures the variability in a dataset, and how to calculate it by hand. See examples, graphs, and formulas for the sample and population SD.

  6. www.scribbr.com › statistics › standard-deviationHow to Calculate Standard Deviation (Guide) - Scribbr

    Sep 17, 2020 · Standard deviation is the average amount of variability in a dataset. It tells you how far each value lies from the mean. Learn how to calculate it for populations and samples, and see examples and formulas.

  7. www.math.net › standard-deviationStandard deviation - Math.net

    Standard deviation is a measure of how spread out a set of numbers is from the mean. Learn how to calculate it for a population or a sample, and how to use the empirical rule to estimate the proportion of data within a certain range of standard deviations.

  8. www.mathsisfun.com › data › standard-deviationStandard Deviation and Variance - Math is Fun

    Learn how to calculate and interpret the standard deviation and variance of a set of data. The standard deviation measures how spread out the data is from the mean, while the variance is the average of the squared differences from the mean.

  9. www.khanacademy.org › math › statistics-probabilityCalculating standard deviation step by step - Khan Academy

    Learn how to compute standard deviation by hand using a formula that involves finding the mean, the distance from each data point to the mean, and the sum of the squares of those distances. Follow an interactive example with a small data set and practice on your own with another data set.