## Chena804 Statistics Question: one year ago one year ago

1. EulerGroupie

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

2. EulerGroupie

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

3. EulerGroupie

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

4. EulerGroupie

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

5. Chena804

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. EulerGroupie

cool

7. EulerGroupie

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