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OpenStudy (howard-wolowitz):
need help
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OpenStudy (phi):
can you do part a?
OpenStudy (howard-wolowitz):
i did attempt, and got a answer in the 40k area so i dont think so
OpenStudy (phi):
the mean is 47 (ignore the 1000s) the std is 4 how "far" is 40 from 47 ? now many standard deviations is that ?
OpenStudy (howard-wolowitz):
47-40 is 7
OpenStudy (phi):
ok, and because 40 is "below" the 47, we do: 40 - 47 = -7 (we always do number - mean) next, how many "standard deviations" is -7 ? divide -7 by the standard deviation. what do you get ?
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OpenStudy (howard-wolowitz):
what did you get? I got a decimal
OpenStudy (howard-wolowitz):
i got exactly -1.75
OpenStudy (phi):
yes, if you draw a bell curve, you have this situation |dw:1461954751844:dw|
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