Answered: A newsgroup is interested in…

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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A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 550 randomly selected Americans surveyed, 442 were in favor of the initiative.

a. With 90% confidence the proportion of all Americans who favor the new Green initiative is between _____ and _____ .

b. If many groups of 550 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About _______ percent of these confidence intervals will contain the true population proportion of Americans who favor the Green initiative and about _______ percent will not contain the true population proportion.

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