Question

Five percent of adults in the United States are planning to purchase a 3D television in the next two years. You randomly select 125 adults in the United States and ask them if they are planning to purchase a 3D television in the next two years.

find the mean and standard deviation

Answer #1

Eighty dash four percent of adults in a certain country believe
that life on other planets is plausible. You randomly select five
adults and ask them whether they believe that life on other planets
is plausible. The random variable represents the number of adults
who believe that life on other planets is plausible.
Find the mean, variance, and standard deviation of the binomial
distribution for the random variable. Interpret the results.
Find the mean of the binomial distribution. (Round to...

5) An environmentalist claims that the mean waste recycled by
adults in the United States is more than 1 pound per person per
day. You wish to test this claim. You find the mean waste recycled
per person per day for a random sample of 12 adults in the United
States is 1.146 pounds per day with a standard deviation of .12
pounds per day. At α = .05, can you support the environmentalists
claim?

Thirty percent of adults strongly believe the news from social
media. You randomly select five adults. Find the probability that
the number of adults who strongly believe the news from social
media is less than three.
Group of answer choices
0.132
0.163
0.837
0.969
Thirty percent of adults strongly believe the news from social
media. You randomly select ten adults. Find the probability that
the number of adults who strongly believe the news from social
media is at most seven....

According to
a study by the Pew Research Center, 15% of adults in the
United States do not use the Internet (Pew Research Center
website, December, ). Suppose that 10 adults in the United States
are selected randomly.
a. Is
the selection of the adults a binomial experiment?
- Select your answer -
Explain.
The input in the box
below will not be graded, but may be reviewed and considered by
your instructor.
b.
What is the probability that none of the...

Five percent of the American truck drivers are women
(Statistical Abstract of the United States, 1997). Suppose 10 truck
drivers are selected randomly to be interviewed about quality of
work conditions.
Explain why the selection of the 10 drivers is a binomial
experiment.
What is the probability that two of the drivers will be
women?
What is the probability that none will be women?
What is the probability that at least one will be woman?

A survey of adults ages? 18-29 found that 93?% use the Internet.
You randomly select 132 adults ages? 18-29 and ask them if they use
the Internet.?
(a) Find the probability that exactly 125 people say they use
the Internet.?
(b) Find the probability that at least 125 people say they use
the Internet.?
(c) Find the probability that fewer than 125 people say they use
the Internet.
?(d) Are any of the probabilities in parts? (a)-(c) unusual?
Explain.

Five percent of workers in a certain city use public
transportation to get work. If you randomly select 250 workers and
ask them if they use public transportation to get to work, find the
probability that more than 16 workers will say yes.

Assume that the salaries of elementary school teachers
in the United States are normally distributed with a mean of 32,000
and a standard deviation of 3,000. If 100 teachers are randomly
selected, find the probability that their mean salary is less than
32,000.

The average sales price of a single-family house in the United
states is $235,500. You randomly select 12 single-family houses.
What is the probability that the mean sales price is more than
$225,000? Assume that the sales prices are normally distributed
with a standard deviation of $50,000?

hello, please write down each step on how you got the answers.
thank you for your help.
Fifty-eight percent of adults plan to purchase a Fitbit next
year. You randomly select 200 adults and ask them if they plan to
buy a Fitbit next year. What is the probability that at least 120
of these adults will say “Yes”?

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