Question

HYBRIAN EMERNANDEZ RODRIGUEZ Prueba Corta # 12 Distribuciones de Probabilidad Discreta , Varianza y Desviación Estándar(4.3) Part-1 Page 7 of 10 Previous Next tal: 10 4 7 7) Find the variance and SD of random variable (x) as shown in the table. 1 1 37 3B 10 a) 62 = 0.120, 0 = 0.346 b) o2 = 0.894, 0 = 0.945 c) o = 0.102, 0 = 0.320 d) o2 = 0.929, 0 = 0.963 9

Answer 1

77 1 Х P (X) 138 37/38 X - E (x2 - Σ ΧΡ(x) x=-1 (L +(-1) 37 38 38 1-37 38 X - 36 38 Σχ2 P(x) y :-) E (x²) = ا 2ر) 2 3 7 37 + (-1) + 38 38 38 38 E (X2)-1 02 = Varex) E(X²)-([(x)) ? -36 2 (-36)? 1-0,8975 0.102 2 0.102 o=0:3197 0.320 cy o2 = 0.102 r = 0.3 20