2. Let R be the region R = {(X,Y)|X2 + y2 < 2} and let (X,Y) be a pair of random variables that is distributed uniformly on this region. That is fx,y(x, y) is constant in this region and 0 elsewhere. State the sample space and find the probability that the random variable x2 + y2 is less than 1, P[X2 +Y? < 1].
problems 14 and 15, let R = {(x,y) : x2 + y2 s 2 and y 2 -x}. Sketch the region of integration for the integral: ll -(X+Y) DA -2 -15 -105051 Compute: e-(x+y) dA and show all work.
3) Let (x, y), (X2, y2), and (X3. Y3) be three points in R2 with X1 < x2 < X3. Suppose that y = ax + by + c is a parabola passing through the three points (x1, yı), (x2, y), and (x3, Y3). We have that a, b, and c must satisfy i = ax + bx + C V2 = ax + bx2 + c y3 = ax} + bx3 + c Let D = x X2 1....
Evaluate the triple integrals JR V and JSSR zdv, where R is the region bounded above by the sphere x2 +y2+22 : 4, below by the cone 3za_ x2 + y2, and such that y 2 0 Evaluate the triple integrals JR V and JSSR zdv, where R is the region bounded above by the sphere x2 +y2+22 : 4, below by the cone 3za_ x2 + y2, and such that y 2 0
Exercise 4.7.4. Let x,y be real numbers such that x2+y2 = 1. Show that there is exactly (Hint: you may need to divide into cases depending on whether x, y are positive negative, or zero.) one real number 0 e (-7r,7r such that r sin(0) and y cos(0) Exercise 4.7.4. Let x,y be real numbers such that x2+y2 = 1. Show that there is exactly (Hint: you may need to divide into cases depending on whether x, y are positive...
3. Verify Stokes' Theorem for the vector field F(x, y, z)= (x2)ĩ+(y2)]+(-xy)k where S is the surface of the cone +y parametrized by (u,v)-(ucos v, u sin v, hu) x2+y2 a at height h above the xy-plane Z = a V 0<vsa, OSvs 2n, and as is the curve parametrized by ē(f) =(acost,asint, h), 0sis27 as x2+ a 3. Verify Stokes' Theorem for the vector field F(x, y, z)= (x2)ĩ+(y2)]+(-xy)k where S is the surface of the cone +y parametrized...
5. (7 points) Let f: R3 → R be the function f(x,y,z) = x2 + y2 +3(2-1)2 Let EC R3 be the closed half-ball E = {(x, y, z) e R$: x² + y2 +< 9 and 2 >0}. Find all the points (x, y, z) at which f attains its global maximum and minimum on E.
Question 3. Consider the function h: R3 → R h(x, y, 2) = (x2 + y2 + 2) +3/(x2 + 2xy + y) (a) What is the maximal domain of h? Describe it in words. (it may help to factor the denominator in the second term) > 0 for any a, (b) It is difficult to immediately find the range of h. Using the fact that a show that h cannot take negative values. Can h be an onto function?...
V X2 + y2 and θ u(r(z, y), θ(x, y))--sech2 r tanh r sin θ 6. [Sec. I 1.5] Letr tan l (y/z) be the usual polar rectangular coordinates relationships. Furthermore, define and u(r(z, y),θ(z, y)) sech2 r tanh r cos θ Show that tanh r
Suppose that X - (Xi,X2,....X) and Y- (Yi, Y2.., Ym) are random samples from continuous distributions F and G, respectively. Wilcoxon's two-sample test statistic W- W(X, Y) is defined to be re R, is the rank of Y, in the combined sample 2. Show that W can be written as where U is the number of pairs (X,, Y,) with Xi < Y. In other words i if X, < Y, v-ΣΣΙ,j, I,,- where 0 otherwise. Hint: Let Yu), Y2),.......