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2. Standard deviation - Wikipedia

   en.wikipedia.org/wiki/Standard_deviation

   In statistics, the standard deviation is a measure of the amount of variation of the values of a variable 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.

3. Unbiased estimation of standard deviation - Wikipedia

   en.wikipedia.org/wiki/Unbiased_estimation_of...

   In statistics and in particular statistical theory, unbiased estimation of a standard deviation is the calculation from a statistical sample of an estimated value of the standard deviation (a measure of statistical dispersion) of a population of values, in such a way that the expected value of the calculation equals the true value.

4. Statistical dispersion - Wikipedia

   en.wikipedia.org/wiki/Statistical_dispersion

   A measure of statistical dispersion is a nonnegative real number that is zero if all the data are the same and increases as the data become more diverse. Most measures of dispersion have the same units as the quantity being measured. In other words, if the measurements are in metres or seconds, so is the measure of dispersion.

5. How to calculate your kitchen island size according to experts

   www.aol.com/news/calculate-kitchen-island-size...

   The right kitchen island size is crucial to a successful room design. This is all the information you need to know to get it right.

6. Deviation (statistics) - Wikipedia

   en.wikipedia.org/wiki/Deviation_(statistics)

   The second standard deviation from the mean in a normal distribution encompasses a larger portion of the data, covering approximately 95% of the observations. Standard deviation is a widely used measure of the spread or dispersion of a dataset. It quantifies the average amount of variation or deviation of individual data points from the mean of ...

7. Variance - Wikipedia

   en.wikipedia.org/wiki/Variance

   The unbiased estimation of standard deviation is a technically involved problem, though for the normal distribution using the term n − 1.5 yields an almost unbiased estimator. The unbiased sample variance is a U-statistic for the function ƒ ( y 1 , y 2 ) = ( y 1 − y 2 ) 2 /2, meaning that it is obtained by averaging a 2-sample statistic ...