anonymous
  • anonymous
see attchment
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
a)
anonymous
  • anonymous
how?

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anonymous
  • anonymous
|dw:1363388359595:dw|
anonymous
  • anonymous
so we want to find that inside probability. so like the last problem we need to find two z scores.
anonymous
  • anonymous
where did you get that 3 and 5 ?
anonymous
  • anonymous
mean mu my bad
anonymous
  • anonymous
|dw:1363388474676:dw|
anonymous
  • anonymous
ok
anonymous
  • anonymous
you mean i have to look up z score between -1 to 1 ?
anonymous
  • anonymous
hello?>
anonymous
  • anonymous
yeah, one sec
anonymous
  • anonymous
are you there?
anonymous
  • anonymous
yeah, I'm just a bit confused.
anonymous
  • anonymous
right now I think that we need to do 1-z1-z2 z1 = (y-mu)/(sigma) the top y value i think is mu+1. sigma is 4. z1 = (mu+1-mu)/4 = 1/4 now for y2 the bottom y value i think is mu-1. sigma is 4. z2 = (mu -1-mu)/4 = -1/4 so 1 -1/4 + 1/4 = 1 but its not an answer, which confuses me.

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