为解决基于卡方统计量离散化方法在处理未知数据特性时的参数难确定问题，提出了一种基于粗糙集方法的自动离散化方法。
Use the method of x2 statistic to extract texts characteristics after processing the text and then use cross cover algorithm to design a classifier.
方法：对83例新生儿继发性呼吸暂停的临床分析及氨茶碱和洛贝林治疗进行比较，用统计学卡方检验。
Methods:Aminophylline and lobeline hydrochloride were used in treatment of 83 newborn babies with intermittent apnea and statistics by tested in Chi square test for comparison.
采用卡方检验进行统计学分析。
Statistical analysis was performed with the chi-square test.
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