[問卦] 為什麼誤差範圍是3%,不是6%?
統計學跟我講誤差範圍3%
是指95%的機率落在+3%和-3%的區間
例如某個藥物有效性是70%,誤差範圍是3%,表示樣本統計後有95%機率落在67%~73%之間
誤差範圍73-67=6%
為什麼會說誤差範圍是3%不是6%?
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