Answered: Political scandal! One month before the…

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

Political scandal! One month before the election, a poll
of 630 randomly selected voters showed 54% planning
to vote for a certain candidate. A week later, it became
known that he had tweeted inappropriate pictures of
himself, and a new poll showed only 51% of 1010 voters
supporting him. Do these results indicate a decrease in
voter support for his candidacy?
a) Test an appropriate hypothesis and state your
conclusion.
b) If your conclusion turns out to be wrong, did you
make a Type I or Type II error?
c) If you concluded there was a difference, estimate that
difference with a confidence interval and interpret
your interval in context.

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