The lengths of pregnancies are normally distributed with a mean of 272 days and a standard...

The lengths of pregnancies are normally distributed with a mean of 272 days and a standard deviation of 16 days.

Find the probability that a pregnancy lasts more than 295 days.
If we stipulate that a baby is premature if the length of pregnancy is in the lowest 3%, find the length of pregnancy that separates premature babies from those who are not premature.

Solutions

Expert Solution

Here we use the properties of normal distribution and area probability curve to calculate the required probabilities and life length of baby.

orchestra answered 11 months ago

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