(Leting g(x) = xn yields moments for example) Finally, the variance of X is denoted by Var(X), defined by E{X − E(X)2}, and can be computed via Var(X) = E(X2)−E2(X), (2) the second moment minus the square of the first moment We usually denote the variance by σ2 = Var(X) and when necessary (to avoid confusion) include X as a subscript4 g 6 P v ^ E ĂS 52 ^ l t K v P 1/2 g 5 l;English In English orthography, x is typically pronounced as the voiceless consonant cluster / k s / when it follows the stressed vowel (eg ox), and the voiced consonant / ɡ z / when it precedes the stressed vowel (eg exam)It is also pronounced / ɡ z / when it precedes a silent h and a stressed vowel (eg exhaust) Before i or u , it can be pronounced / k ʃ / or / ɡ ʒ / (eg 4 3 Projectile Motion University Physics Volume 1 x[V[g 50 Î á ©¦é "¯^