Attorneys
Suppose that you want to test whether the population proportion of attorneys who
make at least $400,000 per year is less than 0.24. A random sample of 200 attorneys
shows that there are 36 of them who make at least $400,000 a year.
What is the rejection region for a hypothesis test at a 10% significance level?
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z < -1.29
Which of the following statistics is a measure of central location?
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, The median
Correct Answer:
All of these choices are true.
A study is under way to determine the average height of all 32,000 adult pine trees in
a certain national forest. The heights of 500 randomly selected adult pine trees are
measured and analyzed. The sample in this study is:
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the heights of the 500 adult pine trees selected at random from this forest.
What is the standard deviation of the following sample data: {3, 4, 9, 15, 18}?
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6.6
A random sample of 10 college students was drawn from a large university. Their ages
are 22, 17, 27, 20, 23, 19, 24, 18, 19, and 24 years, with a sample standard deviation of
3.2.Calculate a confidence interval for the population mean with 99% confidence.
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(18.011, 24.589)
Suppose that you want to test whether the population proportion of attorneys who
make at least $400,000 per year is less than 0.24. A random sample of 200 attorneys
shows that there are 36 of them who make at least $400,000 a year.
What is the rejection region for a hypothesis test at a 10% significance level?
Give this one a try later!
z < -1.29
Which of the following statistics is a measure of central location?
Give this one a try later!
, The median
Correct Answer:
All of these choices are true.
A study is under way to determine the average height of all 32,000 adult pine trees in
a certain national forest. The heights of 500 randomly selected adult pine trees are
measured and analyzed. The sample in this study is:
Give this one a try later!
the heights of the 500 adult pine trees selected at random from this forest.
What is the standard deviation of the following sample data: {3, 4, 9, 15, 18}?
Give this one a try later!
6.6
A random sample of 10 college students was drawn from a large university. Their ages
are 22, 17, 27, 20, 23, 19, 24, 18, 19, and 24 years, with a sample standard deviation of
3.2.Calculate a confidence interval for the population mean with 99% confidence.
Give this one a try later!
(18.011, 24.589)
