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The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days and a standard deviation of 16 days.

Use the Empirical Rule to give a range would you expect to find the middle 95% of most pregnancies?
Between ___ and ___.

If you were to draw samples of size 53 from this population, Use the Empirical Rule to give a range you would you expect to find the middle 95% of averages for the lengths of pregnancies in the samples?
Between ___ and ___.

Your answers should be accurate to 1 decimal place.


Sagot :