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本图可用以计算率的两种类型各两种把握度 u 检验(正态近似法)的样本含量。两种类型是样本率和总体率比较,两样本率比较;两种把握度是 1-β=0.5(一般检验),1-β=0.05(最佳检验)。
This graph can be used to calculate the sample content of two types of power u test (normal approximation method). The two types are the comparison of the sample rate and the overall rate, and the two sample rates are compared; the two powers are 1-β=0.5 (general test) and 1-β=0.05 (best test).