Some times, one needs to calculate some statistics, like effect size; not complex, but takes time. Here is a collection of tools to make that easier.

Free Statistics Calculators – Home

Provides a collection of 106 free online statistics calculators organized into 29 different categories that allow scientists, researchers, students, or anyone else to quickly and easily perform accurate statistical calculations. Also provides a complete set of formulas and scientific references for each statistical calculator.



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