Solution :
a). 
Now, if X = Y, then :

Then, E[X|Y] = x = y
So, 

= 0
Therefore, this statement is TRUE.
b). If X = Y , then Var (X) = Var (Y)
And as Var (X|Y) = 0, so Var (X|Y) ≠ Var (X), except when all the elements of Y are same.
So this statement is FALSE.
c). As defined earlier,

So, this statement is also TRUE.
d). The statement is TRUE because
.
e). FALSE
Because, 
Permutations and Every runner except for the one that was 1st could be 2nd hoep this helps
Yes. It is a yes Bc a yes is a yes and another yes
Answer:
26.4
31.2
33.3
These are the easy questions, the rest will have a square root and a a number outside.