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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 263 days and a standard deviation of 15 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 34 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 ...................

Enter your answers as numbers. Your answers should be accurate to 1 decimal places.

Math   Statistics-And-Probability   
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