This is driving me nuts!
-Z < (XBar - B) / (B/sqrt(n)) < Z
I want to solve this for B (and keep it in the center). I've burned through an eraser.....can anyone show me the steps?
We can split that problem into two inequalities:
1) and 2)
For the first one, we can first multiply both sides of the inequality by ,
and we arrive at .
Then, add to both sides:
We can factor out :
and then divide both sides by , so the final inequality is:
It's the same process for the second inequality. Once you have both inequalities, you can mesh them together to form one big inequality with in the center.