A First Course in Probability (10th Edition)
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ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Transcribed Image Text:**Birthrates**
The birthrates in the United States for the years 2003–2012 are given in the following table. (The birthrate is the number of live births per 1000 population.)
| Year | 2003 | 2004 | 2005 | 2006 | 2007 |
|------|------|------|------|------|------|
| Birthrate | 14.7 | 14.0 | 14.0 | 14.2 | 14.2 |
| Year | 2008 | 2009 | 2010 | 2011 | 2012 |
|------|------|------|------|------|------|
| Birthrate | 14.0 | 13.8 | 13.8 | 13.8 | 13.7 |
**Exercises:**
a. Describe a random variable \( X \) that is associated with these data.
b. Find the probability distribution for the random variable \( X \).
c. Compute the mean, variance, and standard deviation of \( X \).
*Source: National Center for Health Statistics.*
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