anonymous
  • anonymous
Statistics Question:
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
I'm a little weak on stats... but \[z=\frac{x-50}{10}\]
anonymous
  • anonymous
look up .2 in a z table... the closest I get is 0.2005 is z=-.08
anonymous
  • anonymous
\[-.8=\frac{x-50}{10}\]so x=42 dB and below.

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anonymous
  • anonymous
But, as I said... this is a weak subject for me.
anonymous
  • 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.
anonymous
  • anonymous
cool
anonymous
  • anonymous
oops... 0.2005 gets z=-0.8.... same result

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