Question
In: Statistics and Probability
A recent survey found that 70% of all adults over 50 wear glasses for driving. In...
A recent survey found that 70% of all adults over 50 wear glasses for driving. In a random sample of 10 adults over 50, what is the probability that exactly six wear glasses?
Please round answer to the ten-thousandths place (4 places).
Solutions
orchestra answered 1 year agoRelated Solutions
A recent survey found that 63% of all adults over 50 wear glasses for driving. Ia...
A recent survey found that 63% of all adults over 50 wear
glasses for driving. Ia random sample of 100 adults over 50 was
selected., a). what is the expected value and standard deviation of
the number of adults over 50 who wear glasses? b). Find the
probability that more than 60 of the adults over 50 wear glasses.
Hint: using normal distribution to approximate binomial
distribution.
A recent study found that 70% of all people over 60 years of age wear glasses....
A recent study found that 70% of all people over 60 years of age
wear glasses. If a random sample of 8 people over 60 years of age
was selected, find these probabilities: a) Exactly 4 people will
wear glasses. b) At most 2 people will wear glasses. c) At least 2
people will wear glasses. Show work and use binomial probability
table.
In the United States, 75 percent of adults wear glasses or contact lenses. A random sample...
In the United States, 75 percent of adults wear glasses or
contact lenses. A random sample of 10 adults in the United States
will be selected. Which of the following is closest to the
probability that fewer than 8 of the selected adults wear glasses
or contact lenses?
Pinworm: In a random sample of 830 adults in the U.S.A., it was found that 70...
Pinworm: In a random sample of 830 adults in
the U.S.A., it was found that 70 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) Construct the 95% confidence interval for the proportion of all
U.S. adults with pinworm. Round your answers to...
(Survey from 9.41: In a survey of 446 students, it was found that 50% of the...
(Survey from 9.41: In a survey of 446 students, it was found
that 50% of the sampled students lived on campus and 50% lived off
campus.)
In the same survey used in 9.41, 88% of the sampled students were
right-handed.
a. The proportion of all people who are right-handed is said to
be 0.88. Tell the value of standardized sample proportion z, if we
want to test whether the proportion of all students who are right-
handed could be 0.88....
In a certain community, 4 percent of all adults over the age of 50 have tuberculosis...
In a certain community, 4 percent of all adults over the age of
50 have tuberculosis (T.B.). A health service in this community
correctly diagnoses 98 percent of all persons with T.B. as having
the disease, and incorrectly diagnoses 3 percent of all persons
without T.B. as having the disease. Find the probabilities that, a)
the community health service will diagnose an adult over 50 as
having T.B., b) a person over 50 diagnosed by the health service as
having...
In a certain community, 4 percent of all adults over the age of 50 have tuberculosis...
In a certain community, 4 percent of all adults over the age of
50 have tuberculosis (T.B.). A health service in this community
correctly diagnoses 98 percent of all persons with T.B. as having
the disease, and incorrectly diagnoses 3 percent of all persons
without T.B. as having the disease. Find the probabilities
that,
a) the community health service will diagnose an adult over 50
as having T.B.,
b) a person over 50 diagnosed by the health service as having...
A recent survey found that 22% of all people 16 years of age and older do...
A recent survey found that 22% of all people 16 years of age and
older do volunteer work. Suppose a random sample of 350 people 16
years of age and older is taken. What is the probability that more
than 24% of the people in the sample do volunteer work?
a) 0.1894
b) 0.8106
c) 0.1841
d) 0.8159
A recent survey found that about 72.5% of all gasoline purchases at a certain service station...
A recent survey found that about 72.5% of all gasoline purchases
at a certain service station chain are paid with a credit or debit
card. If 300 gasoline purchases completed at this chain are
randomly selected, find the probability that at most 210 of those
purchases are paid with a credit or debit card. Use a TI-83, TI-83
plus, or TI-84 calculator to find the probability.
A nationwide survey of working adults indicates that out of 100 adults, 50 of them are...
A nationwide survey of working adults indicates that out of 100
adults, 50 of them are satisfied with their jobs. The president of
a large company believes that more than this number of employees at
his company are satisfies with their jobs. To test his belief, he
surveys a random sample of 100 employees, and 59 of them report
that they are satisfied with their jobs. Do you support president’s
statement about the employees satisfaction? (Use α = 0.05 level...
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