MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A retirement confidence survey of 1153 workers and retirees in the United States 25 years of

      age and older conducted by Employee Benefit Research Institute in January 2010 found that

      496 had less than $10,000 in savings. 

 

a).  Find the point estimate for the population proportion of workers and retirees in the United

      States 25 years or older who have less than $10,000 in savings.

 

 

 

 

 

b).  Construct a 95% confidence interval for the population proportion of workers and retirees in

       the United States 25 years old or older who have less than $10,000 in savings.

 

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