Hey MathJack.

Hint: Calculate E[Y^2] and E[Y]^2 and remember that SD(Y) = SQRT(Var(Y)).

Results 1 to 2 of 2

- February 18th 2013, 04:16 AM #1

- Joined
- Feb 2013
- From
- Toronto
- Posts
- 188
- Thanks
- 11

- February 19th 2013, 02:09 AM #2

- Joined
- Sep 2012
- From
- Australia
- Posts
- 6,059
- Thanks
- 1595