片语
unbiased estimate population variance无偏估计总离散
estimation population variance总体比例的估计
normal population variance正态总体方差
Population regression variance母体回归变异数
estimation of population variance总体方差的估计
estimation for population variance总体方差的估计
Common population variance共同变异数
Population Coefficient of Variance母体变动系数
Grand population variance大母体的变异数