Question
In: Statistics and Probability
In a recent survey, 34% of employed U.S. adults reported that basic mathematical skills were critical...
In a recent survey, 34% of employed U.S. adults reported that basic mathematical skills were critical or very important to their job. The supervisor of the job placement office at a 4-year college thinks this percentage has increased due to increased use of technology in the workplace. She takes a random sample of 250 employed adults and finds that 90 of them feel that basic mathematical skills are critical or very important to their job. Is there sufficient evidence to conclude that the percentage of employed adults who feel basic mathematical skills are critical or very important to their job has increased at the alpha equals 0.01 level of significance?
Solutions
orchestra answered 2 years agoRelated Solutions
In a recent survey, 56% of employed adults reported that basic mathematical skills were critical. A...
In a recent survey, 56% of employed adults reported that basic
mathematical skills were critical. A supervisor thinks this
percentage has increased due to increased use of technology in the
workplace. She takes a random sample of 470 employed adults and
finds that 281 of them feel that basic mathematical skills are
critical or very important to their job. Test her hypothesis at the
α=0.05 level of significance.
-What is the test statistics?
-What is the critical value?
-Estimate the...
In a recent survey, 56% of employed adults reported that basic mathematical skills were critical. A...
In a recent survey, 56% of employed adults reported that basic
mathematical skills were critical. A supervisor thinks this
percentage has increased due to increased use of technology in the
workplace. She takes a random sample of 470 employed adults and
finds that 281 of them feel that basic mathematical skills are
critical or very important to their job. Test her hypothesis at the
α=0.05 level of significance.
What is the test statistics?
What is the critical value?
Estimate the...
In August 2003, 56% of employed adults in the United States reported that basic mathematical skills...
In August 2003, 56% of employed adults in the United States
reported that basic mathematical skills were critical or very
important to their job. The supervisor of the job placement office
at a 4-year college thinks this percentage has increased due to
increased use of technology in the workplace. He takes a random
sample of 530 employed adults and finds that 324 of them feel that
basic mathematical skills are critical or very important to their
job. Is there sufficient...
In August 2003, 56% of employed adults in the United States reported that basic mathematical skills...
In August 2003, 56% of employed adults in the United States
reported that basic mathematical skills were critical or very
important to their job. The supervisor of the job placement office
at a 4-year college thinks this percentage has increased due to
increased use of technology in the workplace. He takes a random
sample of 530 employed adults and finds that 324 of them feel that
basic mathematical skills are critical or very important to their
job. Is there sufficient...
In August 2003, 56% of all employed adults in the United States reported that basic mathematical...
In August 2003, 56% of all employed adults in the United States
reported that basic mathematical skills were critical or very
important to their job. A researcher believes that this proportion
has increased, so a random sample of 480 employed adults was taken
and 297 of them felt that basic mathematical skills are critical or
very important to their job.
Be sure to check if the conditions are met, and show how
you checked them - show ALL work.
1a)...
A recent CBS News survey reported that 69% of adults felt the U.S. Treasury should continue...
A
recent CBS News survey reported that 69% of adults felt the U.S.
Treasury should continue making pennies.
Suppose we select a sample of 14 adults.
How many of the 14 would we expect to indicate that the
Treasury should continue making pennies? (round your answer to 2
decimal places)
What is the standard deviation? (round your answer to 4
decimal places)
What is the likelihood that exactly 8 adults would indicate
the Treasury should continue making pennies? (round your...
3. a. A survey of 1000 U.S. adults found that 34% of people said that they...
3.
a. A survey of 1000 U.S. adults found that 34% of people said
that they would get no work done on Cyber Monday since they would
spend all day shopping online. Find the 90% confidence interval of
the true proportion. ROUND TO FIVE DECIMAL PLACES
b. In a recent year, 6% of cars sold had a manual transmission.
A random sample of college students who owned cars revealed the
following: out of 129 cars, 23 had manual transmissions. Estimate...
High blood pressure: A national survey reported that 34% of adults in a certain country have...
High blood pressure: A national survey reported
that
34%
of adults in a certain country have hypertension (high blood
pressure). A sample of
24
adults is studied. Round the answer to at least four decimal
places.
Part 1 of 4
(a) What is the probability that exactly
5
of them have hypertension?
The probability that exactly
5
of them have hypertension is .
Part 2 of 4
(b) What is the probability that more than
7
have hypertension?
The probability...
A recent survey of 1000 adults between 18 and 40 showed that 34% said they had...
A recent survey of 1000 adults between 18 and 40 showed that 34%
said they had no credit cards. Find the 99% confidence interval for
the population proportion.
A recent CNN News survey reported that 76% of adults think the U.S. pennies should still be made. Suppose we select a sample of 20 people.
A recent CNN News survey reported that 76% of adults think the U.S. pennies should still be made. Suppose we select a sample of 20 people.
a)How many of the 20 would you expect to indicate that the Treasury should continue making pennies? What is the standard deviation?
b)What is the likelihood that exactly eight people would indicate the Treasury should continue making pennies?
c)What is the likelihood that 10 to 15 adults would indicate the Treasury should continue...
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