Question

In a survey of 1000 Canadian adults, 790 say that the energy situation in Canada is very or fairly serious. 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 order to ensure that the estimate is accurate within 3 % of the population proportion. (a) The critical value: (b) The margin of error: (c) The sample size:

Answer #1

In a survey of 920 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...

In a survey of 1060 Canadian adults, 770 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...

In a survey of 1030 Canadian adults, 720 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...

Pinworm: In a random sample of 790 adults in the U.S.A., it
was found that 76 of those had a pinworm infestation. You want to
find the 99% confidence interval for the proportion of all U.S.
adults with pinworm.
(a) What is the point estimate for the proportion of all U.S.
adults with pinworm? Round your answer to 3 decimal places.
(b) What is the critical value of z (denoted zα/2) for a 99%
confidence interval? Use the value...

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%...

Pinworm: In a random sample of 790 adults in
the U.S.A., it was found that 80 of those had a pinworm
infestation. You want to find the 95% confidence interval for the
proportion of all U.S. adults with pinworm.
(a) What is the point estimate for the proportion of all U.S.
adults with pinworm? Round your answer to 3 decimal
places.
(b) What is the critical value of z (denoted
zα/2) for a 95% confidence interval?
Use the value from...

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 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....

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 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...

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