Question
In: Statistics and Probability
It has been determined, with 90% confidence, that the proportion of students who graduate from college...
It has been determined, with 90% confidence, that the proportion of students who graduate from college are able to find a job in their field of study lies between 64% and 83%. Using this information answer the following questions.
What is the sample proportion?
What is the margin of error?
Interpret this confidence interval in the context of this
problem.
What would happen to this interval if the confidence
level were to increase to 95%?
Solutions
orchestra answered 2 years agoRelated Solutions
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Calculate the 90% confidence interval for the proportion of
voters who cast their ballot for the candidate. Number of votes:
125
Voter Response Dummy Variable
For 1
Against 0
Against 0
For 1
For 1
Against 0
Against 0
Against 0
Against 0
For 1
Against 0
Against 0
Against 0
For 1
Against 0
Against 0
For 1
Against 0
Against 0
For 1
For 1
Against 0
Against 0
For 1
For 1
Against 0
Against 0
Against ...
A psychologist is interested in constructing a 90% confidence interval for the proportion of people who...
A psychologist is interested in constructing a 90% confidence
interval for the proportion of people who accept the theory that a
person's spirit is no more than the complicated network of neurons
in the brain. 64 of the 765 randomly selected people who were
surveyed agreed with this theory. Round answers to 4 decimal places
where possible.
a. With 90% confidence the proportion of all people who accept
the theory that a person's spirit is no more than the complicated...
It has been reported that 42% of college students graduate in 4 years. Consider a random...
It has been reported that 42% of college students graduate in 4
years. Consider a random sample of thirty students, and let the
random variable X be the number who graduate in 4 years.
Find the probability that 14 or fewer students in the sample
graduate in 4 years.
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think the...
A researcher wishes to estimate, with 90% confidence, the
population proportion of adults who think the president of their
country can control the price of gasoline. Her estimate must be
accurate within 4% of the true proportion. a) No preliminary
estimate is available. Find the minimum sample size needed. b)
Find the minimum sample size needed, using a prior study that
found that 32% of the respondents said they think their president
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A researcher wishes to estimate, with 90% confidence, the population proportion of adults who are confident...
A researcher wishes to estimate, with 90% confidence, the
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country's banking system. His estimate must be accurate within 4%
of the population proportion. (a) No preliminary estimate is
available. Find the minimum sample size needed. (b) Find the
minimum sample size needed, using a prior study that found that
32% of the respondents said they are confident with their
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and (b).
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who are confident...
A researcher wishes to estimate, with 90% confidence, the
population proportion of adults who are confident with their
country's banking system. His estimate must be accurate within 5%
of the population proportion. (a) No preliminary estimate is
available. Find the minimum sample size needed. (b) Find the
minimum sample size needed, using a prior study that found that
25% of the respondents said they are confident with their
country's banking system. (c) Compare the results from parts (a)
and (b)....
At a confidence level of 95% a confidence interval for a population proportion is determined to...
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A. the same
B. narrower
C. wider
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think Congress...
A researcher wishes to estimate, with 90% confidence, the
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(a) No preliminary estimate is available. Find the minimum
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(c) Compare the results from...
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