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Openai/691718ed-7ba4-8006-96d5-a66e0d9678fe
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=== Assistant: 好的!在 兩尾檢定 α0.05\alpha0.05α0.05、假設機率 p00.20p00.20p00.20 的情況下,我用常態近似(含連續性校正)算出以下「拒絕區(臨界區)」;在這兩個樣本數下近似非常準確: === 好的!在 兩尾檢定 α=0.05\alpha=0.05α=0.05、假設機率 p0=0.20p_0=0.20p0=0.20 的情況下,我用'''常態近似(含連續性校正)'''算出以下「拒絕區(臨界區)」;在這兩個樣本數下近似非常準確: ===== - 期望值:μ=np0=200\mu = np_0 = 200μ=np0=200 ===== * 標準差:σ=np0(1−p0)=160≈12.65\sigma = \sqrt{np_0(1-p_0)} = \sqrt{160} \approx 12.65σ=np0(1−p0)=160≈12.65 * 臨界 zzz:約 1.96 * 拒絕 H0H_0H0 當: - 男嬰數 ≤175\le 175≤175 或 ≥225\ge 225≥225 * 換成比例:≤17.5%\le 17.5\%≤17.5% 或 ≥22.5%\ge 22.5\%≥22.5%(離 20% 約 ±2.5 個百分點) ===== - 期望值:μ=2000\mu = 2000μ=2000 ===== * 標準差:σ=16000≈126.49\sigma = \sqrt{16000} \approx 126.49σ=16000≈126.49 * 拒絕 H0H_0H0 當: - 男嬰數 ≤1752\le 1752≤1752 或 ≥2248\ge 2248≥2248 * 比例:≤17.52%\le 17.52\%≤17.52% 或 ≥22.48%\ge 22.48\%≥22.48%(離 20% 約 ±2.48 個百分點) : 如果你想要精確二項(非近似)的臨界點,我可以針對 n=1000 做精確計算給你對照;n=10000 也能做,但需要用更穩定的數值法(結果會非常接近上述近似值)。
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