A.此项投资的年终价值的均值为$2200,方差为1560000 B.此项投资的年终价值的均值为$2020,方差为1462000 C.此项投资的年终价值的均值为$2420,方差为1650000 D.此项投资的年终价值的均值为$2240,方差为1620000
A.0.3559 B.0.3539 C.0.3595 D.0.3953
A.0.424 B.0.442 C.0.464 D.0.446