Some reason I get a different answer than the actual answer.

* = Standard Deviation, which is unknown and that is what we are solving for

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- Jun 22nd 2007, 12:39 AMfreudlingstandard deviation
Some reason I get a different answer than the actual answer.

* = Standard Deviation, which is unknown and that is what we are solving for - Jun 22nd 2007, 12:44 AMJhevon
- Jun 22nd 2007, 12:51 AMfreudling
Answer should be .6, but I can't quite get it.

- Jun 22nd 2007, 12:54 AMJhevon
- Jun 22nd 2007, 12:55 AMfreudling
Sorry, my error in posting, it is:

.20 = .08+ [(.13 - .08) * / .25] = .08+ .2 *

* = .12/.2 = .6 - Jun 22nd 2007, 12:58 AMJhevon
ok, so here we can cut out the middle man, and equate the first and last piece, we can do that since all three pieces are equal. i don't know how you ended up with this type of equation to begin with

...........subtract 0.08 from both sides

........divide both sides by 0.2

EDIT: Oh, the last piece is what you simplified the middle piece to get. Ok. Yeah, you still do what I did for the next step - Jun 22nd 2007, 01:00 AMfreudling
Jhevon, you are the man. Thanks.