《医学统计学》 R

random随机random digits随机数字random error随机误差random numbers table随机数目表random sample随机样本random sampling随机抽样random variable随机变量randomization随机化randomized blocks随机区组,随机单位组randomized blocks analysis of　variance随机单位组方差分析randomized blocks design随机单位组设计randomness随机性range极差、全距range of normal values正常值范围rank秩,秩次,等级rank correlation等级相关rank correlation coefficent等级相关系数rank-sum test秩和检验rank test秩(和)检验ranked data等级资料rate率ratio比recovery rate治愈率registration登记regression回归regression analysis回归分析regression coefficient回归系数regression eguation回归方程relative number相对数relative ratio比较相对数relative ratio with fixed base定基比remainder error剩余误差replication重复retrospective survey回顾调查Ridit analysis参照单位分析Ridit value参照单位值