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- •Suppose xau (-54,60) and F(t) is the Cumulative distribution function. which is the probability that x is in the interval E-51.-21] and in the interval [36,57] A. F(57)-F(51) B.(F(-21)- F($1)) +(F(57)-F(-36)) C. (F (-21)-F(-51) × (F(57)-F(-36)) D. F(-21) - F(-36) (6)If the joint probability distribution of X and Y is given by * f (x, y) x+y for x = 0,1,2,3; y = 0,1,2. Find the marginal distribution of X 30 f(x, y) 1 2 3 1 2 3 30 2 30 30 3 4 Y 1 30 30 30 30 3 4 2 30 30 30 30 1 2 3 1 3 f(x) 1 1 3 2 f(x) 1 7 2 10 10 3. 15 If none of the choices, fill the table 1 2 3 |1 2 3 f(x) 1 3 2 f(x) - 10 3 151. Let X, 2 Poisson(A,), for i = 1,2. (a) Show that X1 + Xy~ Poisson(A + A2). (b) Show that X| X + Y is binomial with probability of success equal to (c) What is the distribution of X | X +Y?
- 1. Let X ~ Poisson(A) and Y ~ Poisson(u). Assume that X and Y are independent. Use probability generating functions to find the distribu- tion of X + Y.2. The distribution of a random number X is Uni(0, 1). Find the probability that (a) the first decimal of √X is equal to 3. (b) the first decimal of X² is equal to 3.Q1) 14% of the adults in a certain population are infected by a Corona Virus. Five adults are selected randomly from this population for diagnoses. Find the probability that at least two of them will be infected by .this Virus 1 .Q2) Suppose that f(X)=X,12). a) Find .b) Find the mean Q3) A study shows that the systolic blood pressures for adults in a certain population are approximately normally distributed with mean of 115 and .standard deviation of 10 a) Find the probability that a randomly selected person will have a blood -pressure between 109 and 124 Sel).b) Find the reading that is exceeded by only 5% of the population التي يتجاوزها 5% من المجتمع(
- A.2) The time between successive customers coming to the market is assumed to have Exponential distribution with parameter lambda. a) If X1, X2. ..., Xp are the times, in minutes, between Successive customers selected randomly, estimate the parameter of the distribution. b) The randomly selected 15 times between successive customers are found as 1.8, 1.2, 0.8, 1.4, 1.2, 0.9, 0.6, 1.2, 1.2, 0.8, 1.5, 1.8, 0.9, 1.5 and 0.6 mins. Estimate the mean time between successive customers, and write down the distribution function. c) In order to estimate the distribution parameter with 0.4 error and 4% risk, find the minimum sample size.A person’s birthday occurs on a day i with probability P i , where i = 1, ..., n. (Of course, P 1 + ... + P 2 = 1.) Assume independent assignment of birthdays among different people. In a room with k people, let P k = P k (p 1 , ..., p n ) be the probability that no two persons share a birthday. Show that this probability is maximized when all birthdays are equally likely: p i = 1/n ∀i.A discrete source has 8 symbols x-[x1, x2, x3, x4, x5, x6, x7, x8] with probability P- [1/4, 1/4, 1/8, 1/8, 1/16, 1/16, 1/16, 1/16]. Find info content in each symbol then calculate the entropy.
- 2.Suppose that the return R (in dollars per share) of a stock has the uniform distribution on the interval [-3,7]. Suppose also, that each share of the stock costs $1.50. Let Y be the net return (total return minus cost) on an investment of 10 shares of the stocks. Compute E(Y).A1. Need help plz5.1)Let X be uniformly distributed over (0,7) calculate the probability thata) P(X<4)