Image of maths for computing, Cheat Sheet of Computer Networks

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3 -10" warea) = of Je 4 1Ohxy 4 207 x4 Nar(x) »= soy 10 = 10-10 = 9 (b) ECS) = ECx-l0) = ECx)- a ect) = E Cea-5)- €(4%)-5 =x loes = recs) = ECT) (ce): Var Cg) =var¢cx) = 50. 1,2 = L xsd Naeer)* (4) var Cx) ~ 4 = 1205 ff *d) Both random variables have expected value o, So we would expect both Susan Q Thomas to have a Score OF approximately a. The random variable S which representS Susan's score hag higher variance , meaning we Should exPect it tO Very more )