# The length of human pregnancies from conception to birth varies according to a distribution that is normal with mean 266 days and standard deviation 16 days. Between what values do the lengths of the middle 95% of all pregnancies fall?

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How short are the shortest 2.5% of all pregnancies?

How long are the longest 2.5% all pregnancies?

How short are the shortest 2.5% of all pregnancies?

How long are the longest 2.5% all pregnancies?

##### 1 Answer

Jan 23, 2017

#### Explanation:

Probability of Z score between middle 95% is 0.025 each side.

Therefore the value of length is