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Mathematics, 22.11.2019 22:31 kendelllh
The length of human pregnancies from conception to birth varies according to a distribution that is approximately normal with a mean of 266 days and a standard deviation of 16 days. between what two values do the middle 95% of the lengths of all pregnancies fall?
a. between 218 and 314 days
b. between 234 and 298 days
c. between 202 and 330 days
d. between 250 and 282 days
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