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The length of a particular animals prenancies are approximately normally distributed with a mean of 265 days and a standard deviation of 8. What proportion
The length of a particular animals prenancies are approximately normally distributed with a mean of 265 days and a standard deviation of 8.
- What proportion of pregnancies last more than 279 days?
- What proportion of pregnancies last between 251 and 271 days?
- What is the probability that a randomly selected pregnancy lasts no more than 253 days?
- A very preterm baby is one whose gestation period is less than 247 days. Are very preterm babies unusual?
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