SOLUTION: Birthweights at a local hospital have a normal distribution with a mean of 110 oz. and a standard deviation of 15 oz. What is the probability that a randomly chosen infant has a bi

Question 354144: Birthweights at a local hospital have a normal distribution with a mean of 110 oz. and a standard deviation of 15 oz. What is the probability that a randomly chosen infant has a birthweight between 115 oz. and 130 oz.?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Birthweights at a local hospital have a normal distribution with a mean of 110 oz. and a standard deviation of 15 oz. What is the probability that a randomly chosen infant has a birthweight between 115 oz. and 130 oz.?
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z(115) = (115-110)/15 = 1/3
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z(130) = (130-110)/15 = 4/3
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P(115 < x < 130) = P(1/3 < z < 4/3) = 0.2782
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Cheers,
Stan H.
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