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mezya [45]
3 years ago
14

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.
Mathematics
2 answers:
Usimov [2.4K]3 years ago
8 0

Answer: 2.775%

Step-by-step explanation:

Given: Mean : \mu=3,500\ g

Standard deviation: \sigma=500\ g

The formula to calculate z-score is given by :-

z=\dfrac{x-\mu}{\sigma}

For x= 2,500g

z=\dfrac{2500-3500}{500}=\dfrac{-1000}{500}=-2

The p-value of z = P(z<-2)=0.02275

In percent, 0.02775\times100=2.775\%

The percent of babies born in the United States are classified as having a low birth weight (< 2,500 g) = 2.775%

igomit [66]3 years ago
3 0

Answer:

Sub into equation

Step-by-step explanation:

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