In a poll conducted March 17-21, 2005, by the Pew Research Center for the People and the Press, a simple random sample of 1505 American adults were asked whether they were in favor of tighter enforcement of government rules on TV content during hours when children are most likely to be watching. Of the 1505 adults, 1129 responded yes. 1. What proportion of those surveyed were in favor of tighter enforcement of government rules on TV content during hours when children are most likely to be watching? 2. Obtain a 95% confidence interval for the proportion of Americans who are in favor of tighter enforcement of government rules on TV content during hours when children are most likely to be watching. (Round the final answer to four decimal places). P(1-P) CI = p±z 3. Interpret the confidence interval.

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In a poll conducted March 17-21, 2005, by the Pew Research Center for the People and the
Press, a simple random sample of 1505 American adults were asked whether they were in favor
of tighter enforcement of government rules on TV content during hours when children are most
likely to be watching. Of the 1505 adults, 1129 responded yes.
1. What proportion of those surveyed were in favor of tighter enforcement of government
rules on TV content during hours when children are most likely to be watching?
2. Obtain a 95% confidence interval for the proportion of Americans who are in favor of
tighter enforcement of government rules on TV content during hours when children are
most likely to be watching. (Round the final answer to four decimal places).
P(1-p)
CI = ptz
3. Interpret the confidence interval.
4. What proportion of those surveyed were in favor of tighter enforcement of government
rules on TV content during hours when children are most likely to be watching when we
apply the plus-four method?
x + 2
n+4
5. Using p from the previous step, construct a 95% plus-four confidence interval for the
proportion of Americans who are in favor of tighter enforcement of government rules on
TV content during hours when children are most likely to be watching. (Round the final
answer to four decimal places).
CI = ptz*
P(1-p)
n+ 4
6. What is the purpose of finding the Plus-Four Confidence Interval for a Proportion?
Transcribed Image Text:In a poll conducted March 17-21, 2005, by the Pew Research Center for the People and the Press, a simple random sample of 1505 American adults were asked whether they were in favor of tighter enforcement of government rules on TV content during hours when children are most likely to be watching. Of the 1505 adults, 1129 responded yes. 1. What proportion of those surveyed were in favor of tighter enforcement of government rules on TV content during hours when children are most likely to be watching? 2. Obtain a 95% confidence interval for the proportion of Americans who are in favor of tighter enforcement of government rules on TV content during hours when children are most likely to be watching. (Round the final answer to four decimal places). P(1-p) CI = ptz 3. Interpret the confidence interval. 4. What proportion of those surveyed were in favor of tighter enforcement of government rules on TV content during hours when children are most likely to be watching when we apply the plus-four method? x + 2 n+4 5. Using p from the previous step, construct a 95% plus-four confidence interval for the proportion of Americans who are in favor of tighter enforcement of government rules on TV content during hours when children are most likely to be watching. (Round the final answer to four decimal places). CI = ptz* P(1-p) n+ 4 6. What is the purpose of finding the Plus-Four Confidence Interval for a Proportion?
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