Question

The Pew Research Center Internet Project conducted a survey of 857 Internet users. This survey provided a variety of statistics on them.

If required, round your answers to four decimal places.

(a) |
The sample survey showed that 90% of respondents said the Internet has been a good thing for them personally. Develop a 95% confidence interval for the proportion of respondents who say the Internet has been a good thing for them personally. |

to | |

(b) |
The sample survey showed that 67% of Internet users said the Internet has generally strengthened their relationship with family and friends. Develop a 95% confidence interval for the proportion of respondents who say the Internet has strengthened their relationship with family and friends. |

to | |

(c) |
Fifty-six percent of Internet users have seen an online group come together to help a person or community solve a problem, whereas only 25% have left an online group because of unpleasant interaction. Develop a 95% confidence interval for the proportion of Internet users who say online groups have helped solve a problem. |

to | |

(d) |
Compare the margin of error for the interval estimates in parts (a), (b), and (c). How is the margin of error related to the sample proportion? |

The margin of error - Select your answer
-increasesdecreasesItem 7 as p gets closer to .50. |

Answer #1

The Pew Research Center Internet Project conducted a survey of
957 Internet users. This survey provided a variety of statistics on
them.
If required, round your answers to four decimal places.
(a)
The sample survey showed that 90% of respondents said the
Internet has been a good thing for them personally. Develop a 95%
confidence interval for the proportion of respondents who say the
Internet has been a good thing for them personally.
____to____
(b)
The sample survey showed that...

1) The Pew Research Center Internet Project conducted a survey
of 907 Internet users. This survey provided a variety of statistics
on them. If required, round your answers to four decimal places.
(a) The sample survey showed that 90% of respondents said the
Internet has been a good thing for them personally. Develop a 95%
confidence interval for the proportion of respondents who say the
Internet has been a good thing for them personally. to (b) The
sample survey showed...

A research center conducted a telephone survey of 2,000 adults
to learn about the major economic concerns for the future. The
survey results showed that 1,500 of the respondents think the
future health of Social Security is a major economic concern.
(a)
What is the point estimate of the population proportion of
adults who think the future health of Social Security is a major
economic concern?
(b)
At 90% confidence, what is the margin of error?
(c)
Develop a 90%...

In the spring of 2017, the Consumer Reports National Research
Center conducted a survey of 1,007 adults to learn about their
major healthcare concerns. The survey results showed that 575 of
the respondents lack confidence they will be able to afford health
insurance in the future.
(a)
What is the point estimate of the population proportion of
adults who lack confidence they will be able to afford health
insurance in the future. (Round your answer to two decimal
places.)
(b)...

The Consumer Reports National Research Center conducted a
telephone survey of 2,000 adults to learn about the major economic
concerns for the future. The survey results showed that 1,640 of
the respondents think the future health of Social Security is a
major economic concern.
If computing the confidence intervals manually, make sure to use
at least three decimal digits for the critical values.
a. What is the point estimate of the population
proportion of adults who think the future health...

The Consumer Reports National Research Center conducted a
telephone survey of 2000 adults to learn about the major economic
concerns for the future. The survey results showed that 1760 of the
respondents think the future health of Social Security is a major
economic concern.
What is the point estimate of the population proportion of
adults who think the future health of Social Security is a major
economics concern? (round to two decimal places) Answer At 90%
confidence, what is the...

. A certain Consumer Research Center conducted a telephone
survey of 2500 adults to learn about the major economic concerns
for the future. The survey results showed that 1550 of the
respondents think that the future health of Social Security is a
major economic concern. a. What is the point estimate of the
population proportion of adults who think the future health of
Social Security is a major economic concern? b. Develop a 94%
confidence interval for the population proportion...

America's young people are heavy Internet users; 87% of
Americans ages 12 to 17 are Internet users (The Cincinnati
Enquirer, February 7, 2006). MySpace was voted the most popular
website by 9% in a sample survey of Internet users in this age
group. Suppose 1,600 youths participated in the survey. What is the
margin of error, and what is the interval estimate of the
population proportion for which MySpace is the most popular
website? Use a 95% confidence level and...

A survey revealed that 25% of 474 respondents said they had in
the past sold unwanted gifts over the internet. Use this
information to construct a 95% confidence interval for the
population proportion who sold unwanted gifts over the internet,
rounding your margin of error to the nearest hundredth. Round your
answers 2 decimal places. (_______,_______)

A survey revealed that 25% of 493 respondents said they had in
the past sold unwanted gifts over the internet. Use this
information to construct a 95% confidence interval for the
population proportion who sold unwanted gifts over the internet,
rounding your margin of error to the nearest hundredth. Round your
answers 2 decimal places (________,________)

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