8. Assume X Poisson(). (a) Prove that for any function 9, E(X9(X)) = 4E(g(x + 1))....
(Abstract Algebra) Please answer a-d clearly. Show your work and explain your answer. (a) Let G be a group of order 4 with identity e. Show that G is either cyclic or a2-e for all (b) Does the result of part (a) generalize to groups of order p2 for any positive integer p? In other words, is it the case that if G is a group of order p2 with identity e, then is either cyclic or a- e for...
Compute the expected value of the Poisson distribution with parameter λ X ∼ Poisson(λ). Show E[X(X − 1)(X − 2)· · ·(X − k)] = λ ^(k+1) Use this result, and that in question above, to calculate the variance of X
Suppose a function E:R → R is defined as the solution of the ODE E'(x) = -TE(), E(0) = 1. We will assume that this equation has a solution, and that Ex) #0 for all x E R. For this problem, you are to answer all the equations without solving the differential equationforget that you might be able to do this! (a) Prove that E(x) > 0 for all x (recall: we assume E(x) + 0). (b) Use the mean...
Question 8: For any integer n 20 and any real number x with 0<<1, define the function (Using the ratio test from calculus, it can be shown that this infinite series converges for any fixed integer n.) Determine a closed form expression for Fo(x). (You may use any result that was proven in class.) Let n 21 be an integer and let r be a real number with 0<< 1. Prove that 'n-1(2), n where 1 denotes the derivative of...
9. (Extra problem) (a) Explain why "Poisson(n) integer. nxNormal (1, 1/n)" if n is a large positive (b) Stirling's formula for approximation of factorials is: n!2 Use (a) to give a quick heuristic derivation of Stirling's formula by using a Normal approximation in the calculation of Pr(X =n) = P(n - < X <n+), where X: Poisson(n). Hint: (x)dr f(0) x 2a for small a and any function /
Prove the following Green's identity for function..... 4. (a) Prove the following Green's identity for functions f.g E Co(2) where2C R'" where the notation : ▽ Vf n, where n is the outward pointing unit normal vector. You may use the divergence theorem, as well as the identity (b) Let G(x.xo) denote the Green's function for the Laplacian on Ω with Dirichlet boundary con- ditions, that is, 4,G(x, xo) = δ(x-xo), for x 62 (x,x;)= 0 for x Eon By...
Problem 1: 10 points Assume that a random variable X follows the Poisson distribution with intensity-A, that is k! for k 0,1,2, . Using the identity (valid for all real t) exp(t) = Σ冠. k! k=0 derive the probability that X takes an even value, that is PIX is even
Topology C O, 1 and be the supremum norm (a) Prove that (X || |) is a Banach space. You can assume that (X, | |) is a normed vector space (over R) |f|0supE0.1 \5(x)|.| 4. Let X C (b) Show that || |o0 that the parallelogram identity fails.] on X is not induced by any inner product. Hint: Check for all E[0, 1]. Show that {gn}n>1 (0, 1] BI= {gE X |9||<1} is a compact (c) For every 2...
Time series analysis 1. (a) Use Euler's identity e¡θ-cos θ + i sin θ to prove that sin θ=-(eiO , 2i (b) Use the identities above and the formula for the sum of a geometric series to prove that if n is an integer and j E 1,2,... ,n} then TL TL sin-(2Ttj/n)- n/2 so long as J关[m/2, where Laj is the greatest integer that is smaller than or equal to x (c) Show that when j 0 we have...
Problem 6. [Poisson is Pronounced 'Pwah-ssohn] (a) Suppose that X is a random variable following the Poisson distribution with rate parameter A. Show that E[x]-A Hint: You may find the following fact useful: at k! (b) Suppose that we obtained the following count data: Count Frequency 24 30 17 19 Fit a Poisson distribution to the data using the Method of Moments (c) Suppose that X is a random variable that follows the Poisson distribution that you fit in part...