Gender gap A presidential candidate fears he has aproblem with women voters. His campaign staff plans to run a poll to assess the situation. They’ll randomly sam-ple 300 men and 300 women, asking if they have a favor-able impression of the candidate. Obviously, the staff can’t know this, but suppose the candidate has a positiveimage with 59% of males but with only 53% of females.a) What sampling design is his staff planning to use?b) What difference would you expect the poll to show?c) Of course, sampling error means the poll won’t reflectthe difference perfectly. What’s the standard deviationfor the difference in the proportions?d) Sketch a sampling model for the size differencein proportions of men and women with favorableimpressions of this candidate that might appear ina poll like this.e) Could the campaign be misled by the poll, concludingthat there really is no gender gap? Explain.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
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Author:Carter
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Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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Gender gap A presidential candidate fears he has a
problem with women voters. His campaign staff plans to
run a poll to assess the situation. They’ll randomly sam-
ple 300 men and 300 women, asking if they have a favor-
able impression of the candidate. Obviously, the staff
can’t know this, but suppose the candidate has a positive
image with 59% of males but with only 53% of females.
a) What sampling design is his staff planning to use?
b) What difference would you expect the poll to show?
c) Of course, sampling error means the poll won’t reflect
the difference perfectly. What’s the standard deviation
for the difference in the proportions?
d) Sketch a sampling model for the size difference
in proportions of men and women with favorable
impressions of this candidate that might appear in
a poll like this.
e) Could the campaign be misled by the poll, concluding
that there really is no gender gap? Explain.
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