一、频数分布表的编制
预防医学

        例1-1某年某市120名12岁健康男孩身高资料如表1-1,试编制频数分布表。表1-1某年某市120名12岁健康男孩身高(cm)测量资料142.3156.6142.7145.7138.2141.6142.5130.5132.1135.5134.5145.2151.1141.2143.5134.7150.8134.7129.4148.8141.8144.0141.5139.2147.3144.5132.7154.2138.5142    （共 2089 字）     [阅读本文] >>