The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 13 days. In what range would you expect to find the middle 95% of most pregnancies? Between and . If you were to draw samples of size 55 from this population, in what range would you expect to find the middle 95% of most averages for the lengths of pregnancies in the sample? Between and .

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 13 days.

In what range would you expect to find the middle 95% of most pregnancies?
Between  and .

If you were to draw samples of size 55 from this population, in what range would you expect to find the middle 95% of most averages for the lengths of pregnancies in the sample?
Between  and .

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