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power.t.test(n = NULL, delta = NULL, sd = 1, sig.level = 0.05, power = NULL, type = c("two.sample", "one.sample", "paired"), alternative = c("two.sided", "one.sided"), strict = FALSE) > power.t.test(n = 20, delta = 1) # 已知樣本量, 求功效 Two-sample t test power ...