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vivado [14]
3 years ago
10

In the United States, birth weights of newborn babies are approximately normally distributed with a mean of μ = 3,500 g and a st

andard deviation of σ = 500 g.
What percent of babies born in the United States are classified as having a low birth weight (< 2,500 g)? Explain how you got your answer.


answer:The z-score for 2,500 g is –2.

According to the empirical rule, 95% of babies have a birth weight of between 2,500 g and 4,500 g.

5% of babies have a birth weight of less than 2,500 g or greater than 4,500 g.

Normal distributions are symmetric, so 2.5% of babies weigh less than 2,500g.
Mathematics
2 answers:
andrezito [222]3 years ago
4 0

The z-score for 2,500 g is –2.According to the empirical rule, 95% of babies have a birth weight of between 2,500 g and 4,500 g.5% of babies have a birth weight of less than 2,500 g or greater than 4,500 g.Normal distributions are symmetric, so 2.5% of babies weigh less than 2,500g.

Anastasy [175]3 years ago
4 0

Answer:

3,000 and 4,000

2,500 and 4,500

2,000 and 5,000

Step-by-step explanation:

I just took the class.

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