Question

X 0 a P(x) 0.3 0.25 0.25 0.2 3 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places License

Answer 1

E[X] - (ox 0-3) + (1 X0-25) + (2 X 0.25) +(3X0-2) = 0.25 +0.5 to 6 = 0.75 to 60 = 1.35 (0²x0.3) + (12x 0.25) + (22x0.25)+ (980.2) F[x2] 0-25+ 1 +1.8 -1.25 +1-8 = 3.05 (E[x])² = 3.05 -(1-35)2 = 1-2275 var(x) = E[X standard deviation of x = vuar (x) 1.11