Question
In: Statistics and Probability
_____ 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 a 90% confidence interval estimate of the proportion of U.S. adults that indicate that televisions are a luxury they could do without. Interpret the interval.
e) Produce a 93% confidence interval estimate of the proportion of U.S. adults that indicate that televisions are a luxury they could do without. Just produce and interpret the interval using the TI-83.
Solutions
orchestra answered 2 years agoRelated Solutions
A random sample of 1002 adults in a certain large country was asked "Do you pretty...
A random sample of 1002 adults in a certain large country was
asked "Do you pretty much think televisions are a necessity or a
luxury you could do without?" Of the 1002 adults surveyed, 516
indicated that televisions are a luxury they could do without.
Complete parts (a) through (e) below. Click here to view the
standard normal distribution table (page 1). LOADING... Click here
to view the standard normal distribution table (page 2). LOADING...
(a) Obtain a point estimate...
A random sample of 1008 adults in a certain large country was asked "Do you pretty...
A random sample of 1008 adults in a certain large country was
asked "Do you pretty much think televisions are a necessity or a
luxury you could do without?" Of the 1008 adults surveyed, 511
indicated that televisions are a luxury they could do without.
Complete parts (a) through (e) below.
Click here to view the standard normal distribution table (page
1). LOADING... Click here to view the standard normal distribution
table (page 2). LOADING...
(a) Obtain a point estimate...
A random sample of 1002 adults in a certain large country was asked "Do you pretty...
A random sample of 1002 adults in a certain large country was
asked "Do you pretty much think televisions are a necessity or a
luxury you could do without?" Of the 1002 adults surveyed, 516
indicated that televisions are a luxury they could do without.
Complete parts (a) through (e) below. Click here to view the
standard normal distribution table (page 1). LOADING... Click here
to view the standard normal distribution table (page 2). LOADING...
(a) Obtain a point estimate...
A random sample of 1001 adults in a certain large country was asked "Do you pretty...
A random sample of 1001 adults in a certain large country was
asked "Do you pretty much think televisions are a necessity or a
luxury you could do without?" Of the 1001 adults surveyed, 534
indicated that televisions are a luxury they could do without.
Complete parts (a) through (e) below.
a) Obtain a point estimate for the population proportion of
adults in the country who believe that televisions are a luxury
they could do without.
b) Verify that the...
A random sample of 1027 adults in a certain large country was asked "Do you pretty...
A random sample of 1027 adults in a certain large country was
asked "Do you pretty much think televisions are a necessity or a
luxury you could do without?" Of the 1027 adults surveyed, 517
indicated that televisions are a luxury they could do without.
Complete parts (a) through (e) below. Click here to view the
standard normal distribution table (page 1). LOADING... Click here
to view the standard normal distribution table (page 2). LOADING...
(a) Obtain a point estimate...
A random sample of 1014 adults in a certain large country was asked "Do you pretty...
A random sample of 1014 adults in a certain large country was
asked "Do you pretty much think televisions are a necessity or a
luxury you could do without?" Of the 1014 adults surveyed, 537
indicated that televisions are a luxury they could do without.
Complete parts (a) through (e) below.
(a) Obtain a point estimate for the population proportion of
adults in the country who believe that televisions are a luxury
they could do without.
(b) Verify that the...
A random sample of 10191019 adults in a certain large country was asked "Do you pretty...
A random sample of
10191019
adults in a certain large country was asked "Do you pretty much
think televisions are a necessity or a luxury you could do
without?" Of the
10191019
adults surveyed,
522522
indicated that televisions are a luxury they could do without.
Complete parts (a) through (e) below.Click here to view the
standard normal distribution table (page 1).
LOADING...
Click here to view the standard normal distribution table (page
2).
LOADING...
(a) Obtain a point estimate for...
How much Tv do you watch each week? A random sample of 41 adults were asked...
How much Tv do you watch each week? A random sample of 41 adults
were asked this question and thee mean found to be 3.9 hours with
standard deviation 1.6 hours.
a. Find the 99% confidence interval for the population mean
number of hours of TV watched each week.
b. Is it thought that most adults watch 3 hours of TV each week.
Do the data support this? Why of why not?
c. What is the margin of error in...
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...
The Gallup Poll once asked a random sample of 1600 adults “Do you happen to do...
The Gallup Poll once asked a random sample of 1600 adults “Do
you happen to do step aerobics?” Suppose that in fact 26% of all
Americans do step aerobics.
a) What is the mean of the sampling distribution of proportions
who do step aerobics?
b) What is the standard deviation the sampling distribution of
proportions who do step aerobics?
c) Justify the distribution: HINT: Check that np and n(1-p) are
greater than or equal to 10.
d) What is the...
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