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Get Full Access to Explorations In College Algebra - 5 Edition - Chapter 2 - Problem 18
Get Full Access to Explorations In College Algebra - 5 Edition - Chapter 2 - Problem 18

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# U.S. life expectancy has been steadily increasing (see

ISBN: 9780470466445 178

## Solution for problem 18 Chapter 2

Explorations in College Algebra | 5th Edition

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Problem 18

U.S. life expectancy has been steadily increasing (see Exercise 15 in Section 2.1 and data file for LIFEPXEC). The following graph shows the roughly linear trends for both males and females over more than three decades. a. According to these data, what is the life expectancy of a female born in 1970? Of a male born in 2005? b. Sketch a straight line to create a linear approximation of the data for your gender. Males and females will have different lines. c. Identify two points on your line and calculate the slope. What does your slope mean in this context? The male slope is steeper than the female slope. What does that imply? d. Generate a linear function for your line. (Hint: Let the independent variable be the number of years since 1970.) e. What would your model predict for your sexs life expectancy in 2010? How close does your model come to Census Bureau current predictions of life expectancies in 2010 of 75.6 years for males and 81.4 for females?

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Lecture 1: Statistics Info and some Basic Principles -­‐ Statistics is the most important science in the whole world: for upon it depends the practical application of every other science and of every art: the one science essential to all political and social administration, all education, all organization based on experience, for it only gives results of our experience." Florence Nightingale, Statistician -­‐ Statistics are numbers measured for some purpose. -­‐ Statistics is

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