Question 384288
Assume the variable x is normally distributed with mean u=90 and standard deviation o=4 Find the indicated probability: 
P(80 < x < 87) 
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Comment: normalcdf is used to give you probabilities.
InvNorm is used to give you z-values.
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Your Problem:
P(80< x < 87) = normalcdf(80,87,90,4) = 0.2204
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Cheers,
Stan H.
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