Answered: CBS News poll conducted June 10 and 11,…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

CBS News poll conducted June 10 and 11, 2006, among a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below

	better	same	worse
Republican	38	104	44
Democrat	12	87	137
none	21	90	118

Express each of your answers as a percent rounded to the nearest tenth (for example, 12.3%).

A) What percent of survey respondents identified themselves as affiliated with neither party (marginal probability)?

B) What percent of survey respondents thought the economy was getting better and were affiliated with neither party (joint probability)?

C) What percent of those affiliated with neither party thought the economy was getting better (conditional probability)?

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