σ - Wiktionary
https://en.wiktionary.org/wiki/σ15.01.2021 · Symbol . σ (mathematics, statistics) Standard deviation. (mathematics) Sum of divisors. (mathematics) Braid group algebra. (physics, scattering) Cross section. (linguistics, phonology) Syllable. (spatial databases) The select operation. The Stefan-Boltzmann constant. A shielding constant.
What is symbol for standard deviation? - Wikipedikia ...
wikipedikia.org › what-is-symbol-for-standardWe calculate the standard deviation with the help of the square root of the variance. The symbol of the standard deviation of a random variable is “σ“, the symbol for a sample is “s”. Also, What does the standard deviation tell you? A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.
Standard deviation - Wikipedia
https://en.wikipedia.org/wiki/Standard_deviationIn statistics, the standard deviation is a measure of the amount of variation or dispersion of a set of values. 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.