Y yashbb Active Member Joined Aug 15, 2021 Messages 194 Gender Male HSC 2022 Oct 14, 2021 #1 find var(x)
Y yashbb Active Member Joined Aug 15, 2021 Messages 194 Gender Male HSC 2022 Oct 14, 2021 #2 DrDawn said: Var(X) = E(X^2) - E(X)^2 = 2.6 - 0 = 2.6 E(X^2) = 4(0.3) + 1(0.1) + 0(0.2) + 1(0.1) + 4(0.3) = 2.6 E(X)^2 = (-2(0.3) - 1(0.1) + 0(0.2) + 1(0.1) + 2(0.3))^2 = 0 Click to expand... i did 0.2x0= 0.2... Thank You!!!!!
DrDawn said: Var(X) = E(X^2) - E(X)^2 = 2.6 - 0 = 2.6 E(X^2) = 4(0.3) + 1(0.1) + 0(0.2) + 1(0.1) + 4(0.3) = 2.6 E(X)^2 = (-2(0.3) - 1(0.1) + 0(0.2) + 1(0.1) + 2(0.3))^2 = 0 Click to expand... i did 0.2x0= 0.2... Thank You!!!!!
