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第一类(α)错误出现的概率,即犯假阳性错误的概率,如错误地把无效的治疗措施判为有效的危险率。一般α错误的概率(P_α)定为0.05。
The first category (α) error probability of occurrence, that is false positive false positive probability, such as false invalid treatment measures as valid risk rate. The probability of a common error (P_α) is set at 0.05.