Question

[ANSWERED QUESTION]

Answer 1

shamelessly from wiki:
2.\[
var(aX+bY)=a^2 var(X)+b^2var(Y)+2abcov(X,Y)=
.25\sigma^2+.25\sigma^2+0={\sigma^2\over2}
\]
3.\[var(Z)=.25\sigma^2+.25\sigma^2+2*.5*.5*.5\sigma^2={3\over4}\sigma^2
\]

Answer 2

cool. thanks what about question 1

Answer 3

\[2\mu\]

Answer 4

could u show me how

Answer 5

all hail wiki
\[E[X+Y]=E[X]+E[Y]=\mu+\mu=2\mu\]

Answer 6

oh hold... it'd be \[\mu\]. forgot the 0.5

Answer 7

u still there elctrokid

Answer 8

si

Answer 9

didnt know you could attach files

Answer 10

so is what you said correct.

Answer 11

yep

Answer 12

math dont lie

Answer 13

cool man. Thanks a lot for your help.