Friday, June 19, 2009
formulas drive me mad
♥ 1:56 AM
statistic test tomorrow.and i have 6 lessons to readjeff says im burning midnight oilindeed truelooking at de amout of formulas,they are driving me mad indeed
Var(X)= E(X -μ)2
= E(X2-2μX + μ2) = E(X2)-2μE(X) + E(μ2)
= E(X2)-2μ2+ μ2
= E(X2) -μ2
=E(X2)-[E(X)]2
E[f(X) ±g(X)] = E[f(X)] ±E[g(X)]