Summary of 3.1
-> A DEV_A gives you:
outcome |x1|x2|...|xn
Probability|P1|P2|...|Pn
-> P_i>=0
-> {n/Summation/x=1} P_i = 1
-> YOu can compute:
Expected value:{mu} = E(X) = {n/Summation/{phi}=1}*x_{phi}*P{phi}
Variance: V(X) = {n/Summation/{phi}=1}*(x_{phi} - {mu})^2 * P_{phi}) = {n/Summation/{phi}=1} * x_{phi}^2 * P_{phi} - {mu}^2
Standard Deviation: {phi} = {phi}(X) = sqrt(V(X))