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The lengths of pregnancies in a small rural village are normally distributed with a mean of...

The lengths of pregnancies in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 14 days. In what range would you expect to find the middle 68% of most pregnancies?

Between _and _

If you were to draw samples of size 35 from this population, in what range would you expect to find the middle 68% of most averages for the lengths of pregnancies in the sample?

Between _and _

Math   Statistics-And-Probability   
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