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Power (statistics)
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==Software for power and sample size calculations== Numerous free and/or open source programs are available for performing power and sample size calculations. These include * [[G*Power]] (https://www.gpower.hhu.de/) * WebPower Free online statistical power analysis (https://webpower.psychstat.org) * Free and open source online calculators (https://powerandsamplesize.com) * PowerUp! provides convenient excel-based functions to determine minimum detectable effect size and minimum required sample size for various experimental and quasi-experimental designs. * PowerUpR is R package version of PowerUp! and additionally includes functions to determine sample size for various multilevel randomized experiments with or without budgetary constraints. * R package pwr * R package WebPower * Python package statsmodels (https://www.statsmodels.org/)
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