**What is the symbol for variance and standard deviation**
https://mysweetindulgence.com/common-questions/what-is-the-symbol-for-variance-and-standard-deviation/

The symbol of the variance of a random variable is „σ²“, the symbol of the empirical variance of a sample is „s²“. The squared deviations are 36, 9, 0, 16, 25 – their sum is 86. How do you write variance and standard deviation? To figure out the variance, divide the sum, 82.5, by N-1, which is the sample size (in this case 10) minus 1.

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