Testing two same-size samples, each from different and not necessarily normally distributed populations, can show if populations are the same {F test}. Hypothesize that samples are the same. Set significance level to 5%. Sample degrees of freedom are sample size minus one. Calculate variance ratios between two samples {F distribution, test} {F value, test}: v1 / v2, where v is sample variance. If calculated F value is less than actual F value for degrees of freedom at significance level, do not reject hypothesis. F distribution measures variance distribution.
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Date Modified: 2022.0224