X的边缘分布: p(X=0)=P(X=0,Y=-1)+P(X=0,Y=0)=1/3+1/4=7/12
p(X=1)=P(X=1,Y=-1)+P(X=1,Y=0)=1/4+1/6=5/12
2
y的边缘分布: p(Y=-1)=P(X=0,Y=-1)+P(X=1,Y=-1)=1/3+1/4=7/12
p(Y=0)=P(X=0,Y=0)+P(X=1,Y=0)=1/4+1/6=5/12
3 P(X=0,Y=-1)不等于p(X=0)p(Y=-1) 从而不独立
X的边缘分布: p(X=0)=P(X=0,Y=-1)+P(X=0,Y=0)=1/3+1/4=7/12
p(X=1)=P(X=1,Y=-1)+P(X=1,Y=0)=1/4+1/6=5/12
2
y的边缘分布: p(Y=-1)=P(X=0,Y=-1)+P(X=1,Y=-1)=1/3+1/4=7/12
p(Y=0)=P(X=0,Y=0)+P(X=1,Y=0)=1/4+1/6=5/12
3 P(X=0,Y=-1)不等于p(X=0)p(Y=-1) 从而不独立