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The birth weight of newborn babies is normally distributed with a mean of 7.5 lbs and...

The birth weight of newborn babies is normally distributed with a mean of 7.5 lbs and a standard deviation of 1.2 lbs.

a. Find the probability that a randomly selected newborn baby weighs between 5.9 and 8.1 pounds. Round your answer to 4 decimal places.

b. How much would a newborn baby have to weigh to be in the top 6% for birth weight? Round your answer to 1 decimal place.

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

a)

Let X denote the weight of the newborn (in lbs).

Then

Required probability =

b)

We want find 'x' such that

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