(1) Let qn(x)-IT-1 (z-zi) where the xi, į = 1, , n are equally spaced: zi+1-z-h...
Parts b and c please 4. (25 pts) Given a function f with three continious derivatives, and three equally spaced points zi z, = zi+h, エ3年エ1 + 21, we would like to approxinate f'(z), Let p(z) be the quadratic polynomial interpolating ()) (a) Write p in the Lagrange form. (b) Show the forward difference formula (c) Prove that this expression is a second order approximation off,(r), that is, show that where C depends on the third derivative of f. 4....
2. Suppose Xi ~ N(8,02) where θ > 0. (a) Show that s--(x, Σ¡! xi) is a sufficient statistic of θ where X is the sample mean. (b) Is S minimal sufficient? (c) Can you find a non-constant function g(.) such that g(S) is an ancillary statistic?
Let F(x, y, z) = xi + yj + zk and S be the surface defined by z = 9 – 22 - y2 and 2 > 0. Evaluate SsFinds, where n is the upward unit normal vector.
Q 3 a) Let n > 2 be an integer. Prove that the set {z ET:z” = 1} is a subgroup of (T, *). Show that it is isomorphic to (Zn, + mod n). b) Show that Z2 x Z2 is not isomorphic to Z4. c) Show that Z2 x Z3 is isomorphic to 26.
Exercise 7 (Ancilliarity) Choose one: 1. Let {X;} –1 be independent and identically distributed observations from a location paramter family with cumulative distribution function F(x – 0), -00 < 0 < 0. Show that range of the distribution of R = maxi(Xi) – mini(Xi) does not depend on the parameter 8.) Hint: Use the facts that X1 = Z1 + 0 , ..., Xin = Zn + 0 and mini(Xi) = mini(Zi + 0), maxi(Xi) = maxi(Z; +0), where {Zi}=1...
6. Consider f(x)-sinx and evenly spaced nodes 0-0 < xīく… < Zn-2T. Let P(z) be the piecewise cubic interpolant given values and first derivatives of f at the nodes. (a) In the case n = 100, use calculus and the error formula 4! where 1 E [xi,Ti+1], to bound the absolute error lf(1)-P(1) (b) For arbitrary x E [0.2 , use error bounds to determine n ensuring that If(x)- P(x) s 10-10 6. Consider f(x)-sinx and evenly spaced nodes 0-0
1(a) Let Xi, X2, the random interval (ay,, b%) around 9, where Y, = max(Xi,X2 ,X), a and b are constants such that 1 S a <b. Find the confidence level of this interval. Xi, X, want to test H0: θ-ya versus H1: θ> %. Suppose we set our decision rule as reject Ho , X, be a random sample from the Uniform (0, θ) distribution. Consider (b) ,X5 is a random sample from the Bernoulli (0) distribution, 0 <...
Exercise 3.38. Let the random variable Z have probability density function 24 fz(z) = -1 <z<1 otherwise. (a) Calculate E[Z]. (b) Calculate P(0 <Z<į). (c) Calculate P(Z < į 12 > 0). (d) Calculate all the moments E[Z"] for n= 1,2,3,... Your answer will be a formula that contains n.
Let x[n] be infinite-duration sequence with DTFT of 2n X(e'"), Xi[n] is an N-point finite-duration sequence whose DFT X,(e N ) was obtained by sampling X(eW) at N equally spaced points on the unit circle. Determine xl[n] in terms of x[n] Let x[n] be infinite-duration sequence with DTFT of 2n X(e'"), Xi[n] is an N-point finite-duration sequence whose DFT X,(e N ) was obtained by sampling X(eW) at N equally spaced points on the unit circle. Determine xl[n] in terms...
Ex (5) Let X = (Xi, X2, ,X") be a random sample with size n taken from population has e-부) a) 71 2 X is an unbiased estimator of τ (θ)-2(J+ b) T-X is a consistent estimator of τ (9) (J+ β fx(x ; θ) , β < x <。。.Show that 2)