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Mathematics

1 answer:

iogann1982 [59]3 years ago

3 0

Answer: The answer is A. (-5, -4)

Step-by-step explanation: 7 units ( So your basically counting squares ) behind r going to the left is ( -5, -4) Hope this helps! ~ Autumn :)

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In the United States, the mean birth weight for boys is 3.41 kg with a standard deviation of 0.55 kg. Assume that the distributi

lyudmila [28]

Answer:

The proportion of baby boys in the United States that are born with low birth weight is 0.0495.

Step-by-step explanation:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

3.41 kg with a standard deviation of 0.55 kg.

This means that $\mu = 3.41, \sigma = 0.55$