Question

Translate the statement into a confidence interval. Approximate the level of confidence.

In a survey of 3433 adults in a country,41% believe the economy is getting better. Three weeks prior to this survey, 59% believed that the economy was getting better. The survey's margin of error is plus or minus±1%.

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Translate the statement into a confidence interval. Approximate
the level of confidence.
In a survey of 1032 parents of children ages 8-14, 69% say
they are willing to get a second or part-time job to pay for
their children's college education and 44% say they lose sleep
worrying about college costs. The survey's margin of error is plus
or minus ±4%.
Use the results from the survey about getting a second or
part-time job.

Translate the excerpt below into a confidence interval for p and
approximate the value of the level of confidence, c. In a survey
of 8467 adults, 29.1% said they were taking vitamin E as a
supplement. The survey's margin of error is plus or minus 1%.
The confidence interval proportion p is (___,___)
Round to three decimal places as needed

Translate the excerpt below into a confidence interval for p and
approximate the value of the level of confidence, c.
In a survey of 8495 adults,32.7%said they were taking vitamin
E as a supplement. The survey's margin of error is plus or minus
1%.
a) The confidence interval for the proportion p is ( , )
b) The interval is approximately a___% confidence interval.

Translate the statement into confidence intervals. Approximate
the level of confidence.
In a survey of 1062 in a country 78% said being able to speak
the language is at the core of national identity . The surveys
margin of error is +-3.9%.
The confidence interval for the proportion is (?,?)

How's the economy? A pollster wants to construct a 99.5%
confidence interval for the proportion of
adults who believe that economic conditions are getting better.
b) Estimate the sample size needed if no estimate of P is
available.
A sample of _ adults is needed to obtain a 99.5 confidence
interval with a margin of error of 0.03.

How's the economy? A pollster wants to construct a 99.5%
confidence interval for the proportion of
adults who believe that economic conditions are getting better.
Part: 0 / 20 of 2 Parts Complete
Part 1 of 2
(a) A poll taken in July 2010 estimates this proportion to be 0.37.
Using this estimate,
what sample size is needed so that the confidence interval will
have a margin of error of 0.03?
A sample of __ adults is needed to obtain...

How's the economy? A pollster wants to construct a 95 %
confidence interval for the proportion of adults who believe that
economic conditions are getting better.
(a) A poll taken in July 2010 estimates this proportion to be
0.41 . Using this estimate, what sample size is needed so that the
confidence interval will have a margin of error of 0.02 ?
(b) Estimate the sample size needed if no estimate of p is
available. Part 1 of 2
(a)...

A poll wants to construct a 95% confidence interval for the
proportion of adults who believe that economic conditions are
getting better. A poll taken in July estimates this proportion to
be 0.33 using this estimate what sample sizes needed so that the
confidence interval will have a margin of error of .081

A
pollster wants to construct a 95% confidence interval for the
proportion of adults who believe that economic conditions are
getting better. A Gallup poll taken in July 2010 estimates this
proportion to be 0.33. Using this estimate, what sample size is
needed so that the confidence interval will have a margin of error
of 0.034 ?
Write only an integer as your answer .

A pollster wants to construct a 95% confidence interval for the
proportion of adults who believe that economic conditions are
getting better. A Gallup poll taken in July 2010 estimates this
proportion to be 0.33. Using this estimate, what sample size is
needed so that the confidence interval will have a margin of error
of 0.010 ? Write only an integer as your answer.

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