Question

In a survey, 376 out of 1,078 US adults said they drink at least 4 cups of coffee a day. Find a point estimate (P) for the population proportion of US adults who drink at least 4 cups of coffee a day, then construct a 99% confidence interval for the proportion of adults who drink at least 4 cups of coffee a day

Answer #1

In a survey of 1037 adults from the US age 65 and
over,643 were concern about getting flu.
a) Find a point estimate for the population proportion P of
those concerned about getting the flu.
b) Construct a 95% confidence interval for the population
proportion. What does this interval say to you?
c) Find the minimum sample size needed to estimate the
population proportion at the 99% confidence level in order to
ensure that the estimate is accurate within 4%...

In
a survey of 1022 US Adults, 779 think the US should put more
enphasis on producing energy from solar power.
a.
Find the point of estimate for the population p of US adults
whothink rhat there should be more governmental emphasis on solar
power. Round to 3 decimal places.
b.
construct a 90% confidence interval fir the population
proportion. Interpret your results.

In a survey of 2331 adults, 711 say they believe in UFOs.
Construct a 99 % confidence interval for the population proportion
of adults who believe in UFOs. A 99% confidence interval for the
population proportion is ( nothing, nothing). (Round to three
decimal places as needed.) Interpret your results. Choose the
correct answer below. A. With 99% probability, the population
proportion of adults who do not believe in UFOs is between the
endpoints of the given confidence interval. B....

1. In a survey of 2383 U.S. adults, 1073 think that there should
be more government regulation of oil companies. (Adapted from
Harris Interactive)
(a) Find the point estimate for the population proportion p of
U.S. adults who think that there should be more government
regulation of oil companies.
(b) Construct a 95% confidence interval for the population
proportion. Interpret the results.
(c) Find the minimum sample size needed to estimate the
population proportion at the 99% confidence level in...

In a survey of 2674 adults, 1470 say they have started paying
bills online in the last year. Construct a 99% confidence interval
for the population proportion. Interpret the results.
1) The 90% confidence interval for the population proportion p
is (_,_) (Round to three decimal places as needed.)
Interpret your results. Choose the correct answer below.
A. With 99% confidence, it can be said that the population
proportion of adults who say they have started paying bills online
in...

Savings In a survey of 5, 208 U.S. adults, 3, 872 say they have
saved part of their salary over the last 12 months.
What is the point estimate, pˆ, for p?
What is the point estimate, qˆ, for q?
Construct the 95% confidence interval for the population
proportion p.
Construct the 99% confidence interval for the population
proportion p.
Which interval is wider?

In a survey of 3123 adults, 1492 say they have started paying
bills online in the last year.
1. Construct a 99% confidence interval for the population
proportion. ______-
2. Interpret the results. (multiple choice)
A. The endpoints of the given confidence interval show that
adults pay bills online 99% of the time.
B.With 99% confidence, it can be said that the population
proportion of adults who say they have started paying bills online
in the last year is between...

In a survey of 3398 adults, 1487 say they have started paying
bills online in the last year. Construct a 99% confidence interval
for the population proportion. Interpret the results. A 99%
confidence interval for the population proportion is (___,___).
(Round to three decimal places as needed.) Interpret your results.
Choose the correct answer below.
A. With 99% confidence, it can be said that the population
proportion of adults who say they have started paying bills online
in the last...

In a survey of 3125 adults,1415 say they have started paying
bills online in the last year. Construct a 99% confidence interval
for the population proportion. Interpret the results.
A. 99% confidence interval for the population proportion
is______ (Round to three decimal places as needed.)
Interpret your results. Choose the correct answer below.
A. With 99% confidence, it can be said that the population
proportion of adults who say they have started paying bills online
in the last year is...

4) To estimate the population proportion of a given survey, what
sample size would be required if we want a margin of error of
0.045; a confidence level of 95%; and p and q are unknown.
5). How many cars must be randomly selected and tested in order
to estimate the mean braking distance of registered cars in the US?
We want a 99% confidence that the sample mean is within 2 ft of the
population mean, and the population...

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