## anonymous 3 years ago Statistics Question:

1. anonymous

I'm a little weak on stats... but $z=\frac{x-50}{10}$

2. anonymous

look up .2 in a z table... the closest I get is 0.2005 is z=-.08

3. anonymous

$-.8=\frac{x-50}{10}$so x=42 dB and below.

4. anonymous

But, as I said... this is a weak subject for me.

5. anonymous

That's fine I will test it out thank you for the help though. I have been stuck on this stuff for a while but now I have a better idea on it.

6. anonymous

cool

7. anonymous

oops... 0.2005 gets z=-0.8.... same result