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Q 3. The joint density of Yı, Y2 is given by e-4342 p(y1, y2) = - T, Y1 = 0,1, 2, ...; Y2 = 0, 1, 2, ... a. Find the marginal distribution of Yı. b. Find the conditional distribution of Y2 given that Y1 = yı. c. Determine if Yı and Y2 are independent - justify; you can use your result from b.
(1 point) It can be shown that yı = e-4x and y2 = xe-4x are solutions to the differential equation y + 8y +16y=0 on the interval (-00, 00). Find the Wronskian of yn y (Note the order matters) W(y1, y2) = Do the functions yn y form a fundamental set on (-00,00)? Answer should be yes or no
4. Find the Wronskian for y1 = x , y2 = cos(2x), and y3 = e . 4. (10 points) Find the Wronskian for yı = 23, y2 = cos(2x), and y3 = e3r.
Let Yı, Y2, ...,Yn be an iid sample from a population distribution described by the pdf fy(y|0) = (@+ 1) yº, o<y<1 for 0> - -1. (a) Find the MOM estimator of 0. (b) Find the maximum likelihood estimator (MLE) of 0. (c) Find the MLE of the population mean E(Y) = 0 +1 0 + 2 You do not need to prove that the above is true. Just find its MLE.
Question 4 Let Yı: Y2, .... Yn denote a random sample and let E(Y) = u and Var(Y) = o-y, i = 1, 2, ..., n. (b) Prove that the standard error of the sample mean Y SEⓇ) =
Please help on these HW problems It can be shown that yı = x-2, y2 = x-6 and y3 = 7 are solutions to the differential equation xạy" + 11xy" + 21y' = 0. W(y1, y2, y3) = For an IVP with initial conditions at x = 3, C1yı + C2y2 + c3y3 is the general solution for x on what interval? It can be shown that yı = x-2, y2 = x-7 and y3 = 5 are solutions to...
Chapter 4, Section 4.7, QUestion 23 Given that the given functions yı and y2 satisfy the corresponding homogeneous equation; find a particular solution of the given nonhomogeneous equation ty (3t1y +3y = 8172e6 > 0; y1 (t) = 3t , y2 (t) = e3 The particular solution is Y(t) = Chapter 4, Section 4.7, QUestion 23 Given that the given functions yı and y2 satisfy the corresponding homogeneous equation; find a particular solution of the given nonhomogeneous equation ty (3t1y...
3. (30pt) Suppose that E(Y) = 1, E(Y2) = 2, E(Y3) = 3, V(Y1) = 6, V(Y2) = 7,V (Y3) = 8, Cov(Yı, Y2) = 0, Cov(Yı, Y3) = -4 and 10 1 2 3 Cov(Y2, Y3) = 5. Also define a = 20 and A = 4 5 6 30/ ( 7 8 9 (a) (10pt) Find the expected value and variance covariance matrix of Y, where Y = Y2 (b) (10pt) Compute Eſa'Y) and E(AY). (c) (10pt) Compute...
differential equations 2. (a) Verify that yı = e cos x and y2 = etsin x are solutions of -2y + 2yło on (-00,00). 204 Chapter 5 Linear Second Order Equations (b) Verify that ifc, and are arbitrary constants then y = cre* cos x + cze sinx is a solution of (A) on (-00,00) (c) Solve the initial value problem y" - 2y + 2y = 0, y(0) = 3. y'(O) = -2
true or false If yı(t) and y2(t) are two solutions of the differential equation y2 – y' +y = 0, then for any constants cı and c2, cıyı(t) + C2y2(t) is also a solution. Doğru Yanlış