Find the coordinates of e1 e2
e3 of R3 in terms of [(1,0,0)T ,
(1,1,0)T ,...
Find the coordinates of e1 e2
e3 of R3 in terms of [(1,0,0)T ,
(1,1,0)T , (1,1,1)T ] of R3,, and
then find the matrix of the linear transformation T(x1,,
x2 , x3 )T = [(4xx+
x2- x3)T , (x1 +
3x3)T , (x2 +
2x3)T with respect to this basis.
Let v1=(0,1,2,3),v2=(1,0,-1,0),v3=(0,4,-1,2), and v4=(0,5,1,5).
Let S=(v1,v2,v3,v4)
(1)find a basis for span(S)
(2)is the vector e1=(1,0,0,0) in...
Let v1=(0,1,2,3),v2=(1,0,-1,0),v3=(0,4,-1,2), and v4=(0,5,1,5).
Let S=(v1,v2,v3,v4)
(1)find a basis for span(S)
(2)is the vector e1=(1,0,0,0) in the span of S? Why?
In this question, as usual, e1, e2, e3 are the standard basis
vectors for R 3...
In this question, as usual, e1, e2, e3 are the standard basis
vectors for R 3 (that is, ej has a 1 in the jth position, and has 0
everywhere else). (a) Suppose that D is a 3 × 3 diagonal matrix.
Show that e1, e2, e3 are eigenvectors of D. (b) Suppose that A is a
3 × 3 matrix, and that e1, e2, and e3 are eigenvectors of A. Is it
true that A must be a diagonal...
Suppose that we have a sample space with five equally likely
experimental outcomes: E1, E2, E3,...
Suppose that we have a sample space with five equally likely
experimental outcomes: E1, E2, E3, E4, E5. let
a = {E1, E2}
B = {E3, E4}
C = {E2, E3, E5}
a. Find P(a), P(B), and P(C).
b. Find P(a ∙ B). Are a and B mutually exclusive?
c. Find ac, Cc, P(ac), and P(Cc).
d. Finda∙Bc andP(a∙Bc).
e. Find P(B ∙ C ).
Find the standard matrix for the following transformation T : R
4 → R 3 :...
Find the standard matrix for the following transformation T : R
4 → R 3 : T(x1, x2, x3, x4) = (x1 − x2 + x3 − 3x4, x1 − x2 + 2x3 +
4x4, 2x1 − 2x2 + x3 + 5x4) (a) Compute T(~e1), T(~e2), T(~e3), and
T(~e4). (b) Find an equation in vector form for the set of vectors
~x ∈ R 4 such that T(~x) = (−1, −4, 1). (c) What is the range of
T?
Suppose that we have a sample space with five equally likely
experimental outcomes:
E1, E2,
E3,...
Suppose that we have a sample space with five equally likely
experimental outcomes:
E1, E2,
E3, E4,
E5.
Let
A
=
{E2, E4}
B
=
{E1, E3}
C
=
{E1, E4,
E5}.
(a)
Find
P(A), P(B), and
P(C).
P(A)=
P(B)=
P(C)=
(b)
Find
P(A ∪ B).
P(A ∪ B)
(c)
Find
AC. (Enter your answers as a comma-separated
list.)
AC =
Find
CC. (Enter your answers as a comma-separated
list.)
CC =
Find
P(AC)
and
P(CC).
P(AC)
=
P(CC)
=...
Let S =
{v1,v2,v3,v4,v5}
where v1= (1,−1,2,4), v2 = (0,3,1,2),
v3 = (3,0,7,14), v4 = (1,−1,2,0),...
Let S =
{v1,v2,v3,v4,v5}
where v1= (1,−1,2,4), v2 = (0,3,1,2),
v3 = (3,0,7,14), v4 = (1,−1,2,0),
v5 = (2,1,5,6). Find a subset of S that forms a basis
for span(S).
Let S = {v1, v2, v3, v4} be a given basis of R ^4 . Suppose...
Let S = {v1, v2, v3, v4} be a given basis of R ^4 . Suppose that
A is a (3 × 4) matrix with the following properties: Av1 = 0, A(v1
+ 2v4) = 0, Av2 =[ 1 1 1 ] T , Av3 = [ 0 −1 −4
]T . Find a basis for N (A), and a basis for R(A). Fully
justify your answer.
Consider the following equations:
y1 = a1y2 +a2y3 +x1 +x2 +e1 (1) y2 = by1+2x3+x1+e2 (2)...
Consider the following equations:
y1 = a1y2 +a2y3 +x1 +x2 +e1 (1) y2 = by1+2x3+x1+e2 (2) y3 =cy1+e3
(3)
Here a1, a2, b, c are unknown parameters of interest, which are all
posi- tive. x1, x2, x3 are exogenous variables (uncorrelated with
y1, y2 or y3). e1, e2, e3 are error terms.
(a) In equation (1), why y2,y3 are endogenous?
(b) what is (are) the instrumental variable(s) for y2, y3 in
equation (1)?
(no need to explain why)
(c) In...