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- Suppose the probability of erroneously transmitting a single digit is P=0.03. Compute the probability of transmitting a 4-bit code word with (a) at most one error, and (b) exactly four errors.Let X1, X2, ..., X10 be independent random variables. Let Y1 = min{X1, X2, X3}, Y2 = max{X1, X2, X3}, Y3 = min{X3, X4, X5}, and Y4 = max{X4, X8, X10}. Which of the following statements is true? a) Y1, Y2, Y3, Y4 are dependent on each other. b) Y1, Y4 are independent of each other. c) Y2, Y3 are independent of each other. d) Y1, Y2, Y3, Y4 are independent of each other.An ordinary (fair) coin is tossed 3 times. Outcomes are thus triples of “heads” (h) and “tails” (t) which we write hth, ttt, etc. for each outcome let R be the random variable counting the number of heads in each outcome. For example, if the outcome is hhh, then R (hhh)=3. Suppose that the random variable X is defined in terms of R as follows: X= 2R-2R^2-3. The values of X are given in the table below.
- A box contains 4 black balls and 6 white balls. A player randomly draws one ball and returns the ball to the box along with 2 additional balls with the same color. Then the player randomly draws another ball. Define the random variables as If the first ball is black, Y = If the first ball is white, If the second ball is black, Y, : If the second ball is white, a) Find E(Y,) and Var (Y,) b) Calculate P(Y,+Y, <1) c) Calculate covariance between Y and Y, 6 3 and 5 1 2 A) 5' 5 25 1 and 5 4 В) 25 5 25 1 and 25 5 25 4 1 C) 1 and 5 2 D) 25 5 25 2. 3.Let A, B, and C be independent random variables, uniformly distributed over [0,3], [0,2], and [0,4] respectively. What is the probability that both roots of the equation Ax2Bx+C = 0 are real?3.a. Fill in the blank and prove the resulting statement: If X is a random variable and t is a constant, then Var(tX) = Var(__X). b. If E(X) = 7 and Var(X)= 2, then find E(3X + 4) and Var(3X + 4).
- An ordinary (fair) coin is tossed 3 times. Outcomes are thus triples of "heads" (h) and "tails" (t) which we write hth, ttt, etc. For each outcome, let R be the random variable counting the number of tails in each outcome. For example, if the outcome is tth, then R (tth) = 2. Suppose that the random variable X is defined in terms of R as follows: X=R – 3R-4. The values of X are given in the table below. Outcome hth|hht|hhh tth | thh htt tht ttt Value of X -6 -6 -4 -6 -6 -6 -6 -4 Calculate the values of the probability distribution function of X, i.e. the function py. First, fill in the first row with the values of X. Then fill in the appropriate probabilities in the second row. Value X of X || ? Px (x) O OQ. 1 Deal two cards from a well-shuffled deck of cards. Let the random variable X be the number of aces dealt and let the random variable Y be the number of face cards dealt. (i) Find and sketch fx.y (x, y).Let X and Y denote two random variables. Which of the following can be used to compute Var(X)? A. E[Var(X|Y)] + Var(Var(X|Y)) B. E[E[X|Y]] + Var(Var(X|Y)) C. E[Var(X|Y)] + Var(E[X|Y]) D. Var(E[X|Y]) + Var(Var(X|Y))
- Let X,, X,,X3,X4 be independent random variables each with = 0 and Var(X) = 1 for i= 1,2,3,4. Let Y = X, + X2 +X3 +X4, then Var(Y) = E(X) %3D Select one: a. b. 4 C. 16 d. 16 1/4 O OOptions for both blanks are: must be cannot be may be or may not beX and Y are two discrete random variables. If X and Y are negatively correlated, then: ož-Y 7. o + oỷ. A) В)