Question

1.Simplify (n+1)! / (n-1)!

2..A survey found that 10% of Americans believe that they have seen a UFO. For a sample of 10 people, find the probability that exactly 5 people believe that they have seen a UFO. Use Table B or the binomial probability formula.

Answer #1

2. A survey found that 2 out of 5 Americans say he or she has
visited a doctor in any given month. If 16 people are selected at
random a) Find the probability that 5 or more have visited the
doctor last month. b) What is the mean variance and standard
deviation of this binomial distribution?

A survey found that 2 out of 5 Americans say he or she has
visited a doctor in any given month. If 16 people are selected at
random
Find the probability that 5 or more have visited the doctor
last month.
What is the mean variance and standard deviation of this
binomial distribution?

From a national survey, it was found that about 37% of all
Americans have a short commute to work (i.e. the time it takes to
get to work is less than 15 minutes). suppose you randomly select 5
Americans.
(a). How many people would you expect to have a short
commute?
(b). What is the probability that all 5 people have short
commutes?
(c). What is the probability that at least one person does NOT
have a short commute?
(d)....

A survey by Pew in 2011 found that 56% of Americans believe that
“The Civil War is still relevant to American politics and public
life today”
(http://people-press.org/2011/04/08/civil-war-at-150-still-relevant-still-divisive/).
We hypothesize that the percentage of people who believe the Civil
War is still relevant will be higher in Southern states (like GA)
than in the US as a whole.
Let’s say we conduct our own survey of Georgians to test this
hypothesis and find, based on a survey of 30 Georgians, that...

Chapter 6 Forum In the Healthy Hand-washing Survey conducted by
Bradley Corporation, it was found that 64% of adult Americans
operate the flusher of toilets in public restrooms with their foot.
(a) Suppose a random sample of n = 12 adult Americans is obtained
and the number x who flush public toilets with their foot is
recorded. Explain why this is a binomial experiment. (b) What is
the probability a exactly 8 adults flush public toilets with their
foot? (c)...

A researching team conduct a survey, where out of 76 Americans
surveyed, only 2 had seen or sensed the presence of an angel. Test
the claim that 13% of Americans have seen or sensed the presence of
an angel. Use α = 0.05

1 ) In a study done by Statistics Weekly, they found that 12% of
people believe that there will eventually be a zombie apocalypse.
Suppose we have a random sample of 500, would it be unusual to find
43 people who believe that there will eventually be a zombie
apocalypse. Would it be unusual to find 70 people who believe that
there will eventually be a zombie apocalypse?
2)-If a flight is on time 90% of the time, use a...

According to CNN/USA Today poll appox. 70% of Americans believe
the IRS abuses its power. Let X equal the number of people who
believe the IRS abuses its power in a sample of n=25 Americans.
Assuming that the poll results are still valid , find the
probability that a) X is at least 13 b) X is at most 11 c) x is
equal to 12 d) give the mean, variance, and standard deviation of X
use the binomial probability...

A survey says that 1 in 5 Americans visits a Doctor in any given
month. In a sample of 20 people, what is the probability that
exactly 6 people visit a doctor this month?
What are the odds that no more than 8 visit a doctor this
month?

A poll done for an organization found that 13% of Americans have
seen or sensed the presence of an angel. A contingent doubts that
the percent is really that high. It conducts its own survey. Out of
78 Americans surveyed, only two had seen or sensed the presence of
an angel. As a result of the contingent's survey, would you agree
with the organization's poll? Conduct a hypothesis test at the 5%
level.
Note: If you are using a Student's...

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