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Fundamentals of Statistics | 4th Edition | ISBN: 9780321838704 | Authors: Michael Sullivan,III
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Answer: Birth Weights In 2010, babies born after a

Chapter 10, Problem 5AYU

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QUESTION:

Problem 5AYU

Problem

Birth Weights In 2010, babies born after a gestation period of 32 to 35 weeks had a mean weight of 2600 grams and a standard deviation of 660 grams. In the same year, babies born after a gestation period of 40 weeks had a mean weight of 3500 grams and a standard deviation of 470 grams. Suppose a 34-week gestation period baby weighs 2400 grams and a 40-week gestation period baby weighs 3300 grams. What is the z-score for the 34-week gestation period baby? What is the z-score for the 40-week gestation period baby? Which baby weighs less relative to the gestation period?

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QUESTION:

Problem 5AYU

Problem

Birth Weights In 2010, babies born after a gestation period of 32 to 35 weeks had a mean weight of 2600 grams and a standard deviation of 660 grams. In the same year, babies born after a gestation period of 40 weeks had a mean weight of 3500 grams and a standard deviation of 470 grams. Suppose a 34-week gestation period baby weighs 2400 grams and a 40-week gestation period baby weighs 3300 grams. What is the z-score for the 34-week gestation period baby? What is the z-score for the 40-week gestation period baby? Which baby weighs less relative to the gestation period?

ANSWER:

Answer :

Step 1

From the given problem we know that.

Here babies born after a gestation period of 32 to 35 weeks

A 34-week gestation period baby weighs 2400 grams.

So,x=2400 grams.

A mean weight of 2600 grams.

Here =2600 grams.

A standard deviation of 660 grams.

Here = 660 grams.

Now we have to find the z-score for the 34-week gestation period baby.

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