дисперсия онлайн - SERP Analysis

https://calculator-online.net/ru/variance-calculator/

https://www.standarddeviationcalculator.io/ru/variance-calculator

https://miniwebtool.com/ru/%25D0%25BA%25D0%25B0%25D0%25BB%25D1%258C%25D0%25BA%25D1%2583%25D0%25BB%25D1%258F%25D1%2582%25D0%25BE%25D1%2580-%25D0%25B4%25D0%25B8%25D1%2581%25D0%25BF%25D0%25B5%25D1%2580%25D1%2581%25D0%25B8%25D0%25B8-%25D0%25B2%25D1%258B%25D1%2581%25D0%25BE%25D0%25BA%25D0%25B0%25D1%258F-%25D1%2582%25D0%25BE%25D1%2587%25D0%25BD%25D0%25BE%25D1%2581%25D1%2582%25D1%258C/

https://www.calculator.io/ru/%25D0%25BA%25D0%25B0%25D0%25BB%25D1%258C%25D0%25BA%25D1%2583%25D0%25BB%25D1%258F%25D1%2582%25D0%25BE%25D1%2580-%25D0%25B4%25D0%25B8%25D1%2581%25D0%25BF%25D0%25B5%25D1%2580%25D1%2581%25D0%25B8%25D0%25B8/

https://ru.onlinemschool.com/math/assistance/statistician/variance/

http://www.rnz.ru/statistika/dispersija.shtml

https://www.allmath.com/ru/variance-calculator.php

https://www.calculatored.com/lang/ru/variance-calculator

https://ru.symbolab.com/solver/variance-calculator

https://planetcalc.ru/7688/