Answered: In June 2012 the Gallup organization…

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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In June 2012 the Gallup organization conducted a poll
using a random sample of 1004 adults, aged 18 and older,
living in all 50 U.S. states and the District of Columbia.
When asked, “On the whole, do you think immigration
is a good thing or a bad thing for this country?” 66%
responded “a good thing.” The news report adds, “For
results based on the total sample of national adults, one
can say with 95% confidence that the maximum margin
of sampling error is {4 percentage points.”

Source: http://www.gallup.com/poll/155210/Americans-
Positive-Immigration.aspx

Based on this report, we can conclude that:
A) The percentage of all adult Americans who think
that immigration is a good thing for this country is
between 62% and 70%.
B) There’s a 5% chance that the proportion of all adults
who think immigration is a good thing is not between
62% and 70%
C) In only 5% of all samples like this would the results
differ by more than 4% from the proportion of all
adults who think immigration is a good thing.
D) In 95% of all samples like this between 62% and 70%
of the respondents would say immigration is a good
thing.

E) Between 62% and 70% of Americans think immigra-
tion is a good thing for 95% of all immigrants.

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