Suppose that X1 and X2 are random sample independently drawn from a population X with mean m and standard deviation s. Which one of the following statistics is the best estimator of m?
A、12X1+12X2;
B、14X1+34X2;
C、13X1+23X2;
D、15X1+45X2
发布时间：2025-07-05 23:59:14
