例6-72  使用binostat函數(shù)求二項分布的期望和方差
>> [M,V] = binostat(L,1./L)
M =
     1     1     1     1     1     1     1
V =
    0.8750    0.9000    0.9846    0.9877    0.9896    0.9977    0.9989
>> [m,v] = binostat(L,1/2)
m =
    4.0000    5.0000   32.5000   40.5000   48.0000  213.0000  448.5000
v =
    2.0000    2.5000   16.2500   20.2500   24.0000  106.5000  224.2500
>>