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Nostrana [21]
2 years ago
7

According to medscape.com, microcephaly is a head circumference more than two standard deviations below the mean. what percentag

e of 1-month old girls will be categorized as having microcephaly? how do you know?
Mathematics
1 answer:
lions [1.4K]2 years ago
7 0

Using the normal distribution, it is found that 2.28% of 1-month old girls will be categorized as having microcephaly.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

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

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The proportion more than two standard deviations below the mean is the <u>p-value of Z = -2,</u> given by 0.0228, hence 2.28% of 1-month old girls will be categorized as having microcephaly.

More can be learned about the normal distribution at brainly.com/question/4079902

#SPJ1

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Step-by-step explanation:

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