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

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Statistics

The lengths of pregnancies in a small rural village are normallydistributed with a mean of 264 days and a standard deviation of 15days.

In what range would we expect to find the middle 68% of mostlengths of pregnancies? Round the answer to one decimalplace.

Between and days

If we were to draw samples of size 56 from this population, in whatrange would we expect to find the middle 68% of most averages forthe lengths of pregnancies in the sample? Round the answer toone decimal place.

Between and days

Answer & Explanation Solved by verified expert
3.6 Ratings (327 Votes)
Solution Given thatmean 264standard deviation 15Using standard normal tablea Pz Z    See Answer
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