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The Greek letter σ (sigma) is used in statistics to represent the standard deviation of a population.
- Capital Sigma
In math, the summation symbol (∑) is used to denote the...
- Capital Sigma
Standard deviation may be abbreviated SD or Std Dev, and is most commonly represented in mathematical texts and equations by the lowercase Greek letter σ (sigma), for the population standard deviation, or the Latin letter s, for the sample standard deviation.
17 Σεπ 2020 · Learn how to calculate standard deviation, a measure of variability, for populations and samples. See the standard deviation symbol, formulas, calculator and examples of normal and non-normal distributions.
Learn what standard deviation is, how to calculate it for population and sample data, and how to interpret it with a histogram. See the symbols for standard deviation (σ and s), mean (μ and x ¯), and summation (∑).
Learn how to interpret and calculate the standard deviation, a measure of variability that uses the original data units. See examples, graphs, and formulas for the sample and population versions.
Learn how to calculate the standard deviation and variance of a set of numbers, and what they mean. The standard deviation symbol is σ (sigma), and the variance symbol is σ2.
The idea of spread and standard deviation. Calculating standard deviation step by step. Standard deviation of a population. Mean and standard deviation versus median and IQR. Concept check: Standard deviation. Statistics: Alternate variance formulas.
