Consider the cdf of a discrete random variable X given below. What is P(1s x s 3)? O if x<0 0.2 ifOsx<2 0.6 if 2 sx<3 0.9 if 3 5x <5 1 #55x F(x) Select one: a. 0.3 b. 0.7 C0.4 d. 0.8 e. 0.6

Suppose that X, Y, and Z are jointly distributed random variables, that is, they are defined on the same sample space. Suppose that we also have the following. E(Y)=-7 Var (X) = 20 Var (Y)=6 Var (z) = 23 E (X) = 5 E(Z) = 3 Compute the values of the expressions below. E (-2X – 4) = -3Z + 2X E 3 Var (27 + 3) - O =(-sx") - O

Suppose that X, Y, and Z are jointly distributed random variables, that is, they are defined on the same sample space. Suppose that we also have the following. E(X)=5 Var(X) = 44 Var(Y)=23 Var(Z) = 32 E (Y)=-2 E(Z)=-4 %3D %3D Compute the values of the expressions below. E(-5+5Y)= | 3Y+5X E -3 Var(5X-5) = I E-2

Consider a discrete random variable with this pmf: 3 7 6. f(x) 0.16 0.25 0.07 0.52 O 3e0.16t + 5e.25t + 7e0.07t + 9e0.52t O 0.16e3t + 0.25e5t + 0.07et + 0.52et O 0.48e3t + 1.25e5t + 0.49e7t + 4.68et O 0.16e3t x 0.25e5t x 0.07e7t x 0.52et