预期收入率 = E(R)
= (0.01)(0.1)+(0.02)(0.1)+(0.03)(0.2)+(0.04)(0.3)+(0.05)(0.2)+(0.06)(0.1) = 3.7/100
收入的方差 = ((0.01-0.037)^2)(0.1)+((0.02-0.037)^2)(0.1)+((0.03-0.037)^2)(0.2)
+((0.04-0.037)^2)(0.3)+((0.05-0.037)^2)(0.2)+((0.06-0.037)^2)(0.1)
= 0.0000201
预期收入率 = E(R)
= (0.01)(0.1)+(0.02)(0.1)+(0.03)(0.2)+(0.04)(0.3)+(0.05)(0.2)+(0.06)(0.1) = 3.7/100
收入的方差 = ((0.01-0.037)^2)(0.1)+((0.02-0.037)^2)(0.1)+((0.03-0.037)^2)(0.2)
+((0.04-0.037)^2)(0.3)+((0.05-0.037)^2)(0.2)+((0.06-0.037)^2)(0.1)
= 0.0000201