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oksian1 [2.3K]
3 years ago
9

Help , please and thanks

Mathematics
1 answer:
horrorfan [7]3 years ago
5 0
The first 3 , after 2 and 6
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iragen [17]

Answer:

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Step-by-step explanation:

The Empirical Rule(68-95-99.7 rule) states that, for a normally distributed random variable:

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So

267 - 2*19 = 229 days

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95% of all pregnancies fall within 2 standard deviations of the mean. The other 5% are more than 2 standard deviations from the mean. Since the distribution is symmetric, 2.5% is more than 2 standard deviations below the mean(shortest 2.5%) and 2.5% is more than 2 standard deviations above the mean(longest 2.5%). So

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