Question
In: Statistics and Probability
In a survey of 1010 adults, a polling agency asked, "When you retire, do you think...
In a survey of 1010 adults, a polling agency asked, "When you retire, do you think you will have enough money to live comfortably or not. Of the 1010 surveyed,
532 stated that they were worried about having enough money to live comfortably in retirement. Construct a 99% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.
Select the correct choice below and fill in the answer boxes to complete your choice.
(Use ascending order. Round to three decimal places as needed.)
A.There is a 99% probability that the true proportion of worried adults is between ____ and ____.
B.There is 99% confidence that the true proportion of worried adults is between ____and____.
C. 99% of the population lies in the interval between ____and____.
Solutions
orchestra answered 2 years agoRelated Solutions
In a survey of 1002 adults, a polling agency asked, "When you retire, do you think...
In a survey of 1002 adults, a polling agency asked, "When you
retire, do you think you will have enough money to live comfortably
or not. Of the 1002 surveyed, 524 stated that they were worried
about having enough money to live comfortably in retirement.
Construct a 99% confidence interval for the proportion of adults
who are worried about having enough money to live comfortably in
retirement.
Select the correct choice below and fill in the answer boxes to
complete...
Elderly drivers. A polling agency interviews 754 American adults and finds that 467 think licensed drivers...
Elderly drivers. A polling agency interviews
754 American adults and finds that 467 think licensed drivers
should be required to retake their road test once they reach 65
years of age. Round all answers to 4 decimal places.
1. Calculate the point estimate for the proportion of American
adults that think licensed drivers should be required to retake
their road test once they reach 65 years of age.
2. Calculate the standard error for the point estimate you
calculated in...
One thousand randomly selected adult Americans participated in a survey. When asked "Do you think it...
One thousand randomly selected adult Americans participated in a
survey. When asked "Do you think it is sometimes justified to lie
or do you think lying is never justified?" 52% responded that lying
was never justified. When asked about lying to avoid hurting
someone's feelings, 610 responded that this was often or sometimes
okay.
(a)Construct a 90% confidence interval for the proportion of
adult Americans who think lying is never justified. (Round your
answers to three decimal places.)
( _...
A sample of n = 1,033 adults in the United States was asked, "Do you think...
A sample of n = 1,033 adults in the United States was asked, "Do
you think the police should or should not be allowed to collect DNA
information from suspected criminals, similar to how they take
fingerprints?" Of those sampled, 68% answered "should". (Round your
answers to the nearest tenth.)
(a) Calculate the conservative margin of error for the survey,
as a percentage.
(b) Compute an approximate 95% confidence interval for the
percentage of all American adults who think police...
In a survey of 1010 Canadian adults, 780 say that the energy situation in Canada is...
In a survey of 1010 Canadian adults, 780 say that the energy
situation in Canada is very or fairly serious.
1. Find the point estimate for the population proportion
2. Construct a 95% confidence interval for the population
proportion.
a) The critical value
b) The margin of error
c) The lower limit of the interval
d) The upper limit of the interval
3. Find the minimum sample size needed to estimate the
population proportion at the 99% confidence level in...
A survey of 300 hospital workers is taken. The question asked is "Do you think that...
A survey of 300 hospital workers is taken. The question asked is
"Do you think that staffing is adequate at your hospital, yes or
no?" Perform the Chi-square test to determine if the frequency of
no responses is statistically larger than the frequency of yes
responses. The following responses were received: yes - 120, no -
180.
In 1983, the General Social Survey asked the question, “Do you think a woman should be...
In 1983, the General Social Survey asked the question, “Do you
think a woman should
be able to have an abortion for any reason?” Of the 1515 people
asked, 539 said yes; the
rest said no. In 1999, the General Social Survey asked 877 people
the same question,
and 361 responded yes; the rest said no. Denote the true proportion
of people who felt
that women should be able to have an abortion for any reason in
1983 by p1,...
_____ A random sample of 1003 U.S. adults was asked “Do you pretty much think televisions...
_____ A random sample of 1003 U.S. adults was asked “Do you
pretty much think televisions are a necessity of a luxury you could
do without?” OF the 1003 adults surveyed, 521 indicated that
televisions are a luxury they could do without.
a) What are the observational units?
b) What is the variable? Is it binary/dichotomous?
c) Verify that the conditions of the confidence interval are met
– that we have a representative sample, and that and .
d) Produce...
2. A public polling agency conducts a survey to determine the current consumer sentiment concerning the...
2. A public polling agency conducts a survey to determine the
current consumer sentiment concerning the state of the economy.
Last year's poll shows that 30% of consumers are optimistic about
the state of the economy. Suppose the public polling agency
randomly samples 485 consumers and finds that only 158 are
optimistic about the state of the economy.
a) What is the parameter of interest? explain
b) Construct a 95% confidence interval for the parameter of
interest and interpret the...
A survey of 800 adults from a certain region asked, "What do you buy from your...
A survey of 800 adults from a certain region asked, "What do
you buy from your mobile device?" The results indicated that 57%
of the females and 48% of the males answered clothes. The sample
sizes of males and females were not provided. Suppose that of 500
females, 285 reported they buy clothing from their mobile device,
while of 300 males, 144 reported they buy clothing from their
mobile device.
A. is there evidence of a difference between males and...
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