对毒力测定机率值分析法的新见解

New opinion of the probit analysis method for toxicity

对毒力测定的机率值分析法进行研究，结果表明，用机率值ｙ关于剂量值ｘ的加权直线回归来估计致死中量及其方差不符合统计学原理，建议用ｘ关于ｙ的加权直线回归方法估计。

The probit analysis method for toxicity has been studied. The result show that using probit value y about dosage x's weight regression to estimate half dead dosage (LD50) and it,s variance is not in accordance with the statistical priciple. The x to y's weight linear regression method should be adopted.