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Openai/691718ed-7ba4-8006-96d5-a66e0d9678fe
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==== - 當樣本數 nnn 增加時,標準差 σ=np(1−p)\sigma = \sqrt{np(1-p)}σ=np(1−p) 也會變大,但相對於樣本數的比例差會變小。 ==== * 這代表:樣本數越大,我們對「真實出生率是不是等於 0.5」的判斷越精準。 * 結果就是:只要有一點點差異,在大樣本下也可能被檢測出顯著差異。
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