Question

A population proportion is to be estimated from a sample of 64 with a sample proportion of 0.9. Approximate the 95% confidence interval of the population proportion. Round to four decimal places, if necessary.

A. 0.8470<p<0.9530

B. 0.7750<p<1.0250

C. 0.8250<p<0.9750

D. 0.8906<p<0.9094

Answer #1

Assume that population proportion is to be estimated from the
sample described. Use the sample results to approximate the margin
of error and 95% confidence interval.
n=560, p-0.65 Round to four decimal places as needed.

Suppose that a random sample of size 64 is to be selected from a
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(a) What are the mean and standard deviation of the sampling
distribution?
μx =
σx =
(b) What is the approximate probability that x will be
within 0.4 of the population mean μ? (Round your answer to
four decimal places.)
P =
(c) What is the approximate probability that x will differ
from μ by more than 0.8?...

Assume that population mean is to be estimated from the sample
described. Use the sample results to approximate the margin of
error and 95% confidence interval. Sample size, n=64; sample
mean, x overbare=83.0 cm; sample standard deviation, s=4.0
cm.
The margin of error is ____ cm. (Round to one decimal place as
needed.)

A1.) A population proportion is estimated to be 0.0283 < p
< 0.0373 at 95% confidence level. Using 4 decimal places for
zc find the least sample size required to
ensure this estimate.
N=
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p^= 0.3832 at 99% confidence level. Using 4 decimal places for
zc, find the least sample size required to
ensure this estimate.
N=
A2.) A population proportion is estimated to be 0.0323 < p
<...

A) Assume that a sample is used to estimate a population
proportion p. Find the margin of error E that corresponds to the
given statistics and confidence level. Round the margin of error to
four decimal places.
90% confidence; n = 341, x = 173
B) Assume that a sample is used to estimate a population
proportion p. Find the margin of error E that corresponds to the
given statistics and confidence level. Round the margin of error to
four...

In a survey of
607
males ages 18-64,
393
say they have gone to the dentist in the past year.
Construct 90% and 95% confidence intervals for the population
proportion. Interpret the results and compare the widths of the
confidence intervals. If convenient, use technology to construct
the confidence intervals.
The 90% confidence interval for the population proportion p
is
(______,______). (Round to three decimal places as
needed.)
The 95% confidence interval for the population proportion p
is
(______,_______). (Round...

A sample of 1100 observations taken from a population produced a
sample proportion of 0.36. Make a 90% confidence interval for
p.
Round your answers to three decimal places.

In a simple random sample of size 63, taken from a population,
24 of the individuals met a specified criteria.
a) What is the margin of error for a 90% confidence interval for
p, the population proportion?
Round your response to at least 3 decimal places.
b) What is the margin of error for a 95% confidence interval for
p?
Round your response to at least 3 decimal places.

In a survey of 619 males ages 18-64, 395 say they have gone to
the dentist in the past year. Construct 90% and 95% confidence
intervals for the population proportion. Interpret the results and
compare the widths of the confidence intervals. If convenient, use
technology to construct the confidence intervals.
The 90% confidence interval for the population proportion p is (
__ _, ___ ). (Round to three decimal places as needed.)
The 95% confidence interval for the population proportion...

A random sample of size n = 50 is selected from a
binomial distribution with population proportion
p = 0.8.
Describe the approximate shape of the sampling distribution of
p̂.
Calculate the mean and standard deviation (or standard error) of
the sampling distribution of p̂. (Round your standard
deviation to four decimal places.)
mean =
standard deviation =
Find the probability that the sample proportion p̂ is
less than 0.9. (Round your answer to four decimal places.)

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