variancen.不一致;变化;[数]方差
variance of probability distribution概率分布的方差
variance within primary sample units初级抽样单位内的方差
variance-covariance propagation law方差-协方差传播律
variance between primary sample units初级抽样单位间的方差
variance-optimal martingale measure方差最优鞅测度
variance of a probability distribution概率分布的方差