275 Answered Questions for the topic Stats

08/04/21

C17.4: . The sample showed the average loss was ​$8601 with a standard deviation of ​$1405
The housing market has recovered slowly from the economic crisis of 2008.​ Recently, in one large​ community, realtors randomly sampled 48 bids from potential buyers to estimate the average loss in... more
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08/04/21

C17.4: . The sample showed the average loss was ​$8601 with a standard deviation of ​$1405
The housing market has recovered slowly from the economic crisis of 2008.​ Recently, in one large​ community, realtors randomly sampled 48 bids from potential buyers to estimate the average loss in... more
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08/04/21

C21.7: Find a​ 95% confidence interval for this difference and interpret it in context.
In analyzing the city and highway fuel efficiencies of many cars and​ trucks, the mean difference in fuel efficiencies for the 632 vehicles was 7.36 mpg with a standard deviation of 2.59 mpg. Find... more
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08/04/21

C21.7: Find a​ 95% confidence interval for this difference and interpret it in context.
In analyzing the city and highway fuel efficiencies of many cars and​ trucks, the mean difference in fuel efficiencies for the 632 vehicles was 7.36 mpg with a standard deviation of 2.59 mpg. Find... more
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07/29/21

C13: What is the probability that a randomly selected person in the country enjoys cooking or shopping or​ both?
Fifty-four percent of people in a certain country like to cook and 52​% of people in the country like to​ shop,while 22​% enjoy both activities. What is the probability that a randomly selected... more
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07/29/21

C13: What is the probability that a randomly selected person in the country enjoys cooking or shopping or​ both?
Fifty-four percent of people in a certain country like to cook and 52​% of people in the country like to​ shop,while 22​% enjoy both activities. What is the probability that a randomly selected... more
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07/29/21

Suppose that 20​% of people have a dog​, 32​% of people have a cat​, and 8​% of people own both. What is the probability that someone owns a dog or a cat​?
Suppose that 20​% of people have a dog​, 32​% of people have a cat​, and 8​% of people own both. What is the probability that someone owns a dog or a cat​?
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07/29/21

Suppose that 20​% of people have a dog​, 32​% of people have a cat​, and 8​% of people own both. What is the probability that someone owns a dog or a cat​?
Suppose that 20​% of people have a dog​, 32​% of people have a cat​, and 8​% of people own both. What is the probability that someone owns a dog or a cat​?
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07/29/21

In which month is it more unusual to have a day with a high temperature of 55°​? Explain.
A​ town's January high temperatures average 37°F with a standard deviation of 10°​, while in July the mean high temperature is 77° and the standard deviation is 10°. In which month is it more... more
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07/29/21

In which month is it more unusual to have a day with a high temperature of 55°​? Explain.
A​ town's January high temperatures average 37°F with a standard deviation of 10°​, while in July the mean high temperature is 77° and the standard deviation is 10°. In which month is it more... more
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07/29/21

C5.5: Suppose that the weights of all such animals can be described by a Normal model with a standard deviation of 98 pounds.
A livestock cooperative reports that the mean weight of yearling Angus steers is 1147 pounds. Suppose that the weights of all such animals can be described by a Normal model with a standard... more
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07/29/21

C5.5: Suppose that the weights of all such animals can be described by a Normal model with a standard deviation of 98 pounds.
A livestock cooperative reports that the mean weight of yearling Angus steers is 1147 pounds. Suppose that the weights of all such animals can be described by a Normal model with a standard... more
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06/07/21

In a one-tailed test, in which critical value listed below will the computed z of 2.313 fall in the acceptance region?
In a one-tailed test, in which critical value listed below will the computed z of 2.313 fall in the acceptance region?A. No answerB. 2.365C. 2.228D. 1.383E. 1.533
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03/18/21

Find the standard​ deviation, s, of sample data summarized in the frequency distribution table given below.
Find the standard​ deviation, s, of sample data summarized in the frequency distribution table given below.Interval30​-3940​-4950​-5960​-6970​-7980​-89 Frequency3233920104 Standard deviation=... more
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03/18/21

Find the standard​ deviation, s, of sample data summarized in the frequency distribution table given below.
Find the standard​ deviation, s, of sample data summarized in the frequency distribution table given below.Interval30​-3940​-4950​-5960​-6970​-7980​-89 Frequency3233920104 Standard deviation=... more
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03/18/21

In a recent year the magnitudes​ (Richter scale) of​ 10,594 earthquakes were recorded. The mean is 1.224 and the standard deviation is 0.56. Consider the magnitudes that are unusual.
In a recent year the magnitudes​ (Richter scale) of​ 10,594 earthquakes were recorded. The mean is 1.224 and the standard deviation is 0.56. Consider the magnitudes that are unusual. What are the... more
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03/18/21

In a recent year the magnitudes​ (Richter scale) of​ 10,594 earthquakes were recorded. The mean is 1.224 and the standard deviation is 0.56. Consider the magnitudes that are unusual.
In a recent year the magnitudes​ (Richter scale) of​ 10,594 earthquakes were recorded. The mean is 1.224 and the standard deviation is 0.56. Consider the magnitudes that are unusual. What are the... more
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03/18/21

What are the IQ scores that separate the unusual IQ scores from those that are​ usual? (Consider a value to be unusual if its z score is less than −2 or greater than​ 2.)
IQ scores are measured with a test designed so that the mean is 97 and the standard deviation is 16. Consider the group of IQ scores that are unusual. What are the z scores that separate the... more
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03/18/21

What are the IQ scores that separate the unusual IQ scores from those that are​ usual? (Consider a value to be unusual if its z score is less than −2 or greater than​ 2.)
IQ scores are measured with a test designed so that the mean is 97 and the standard deviation is 16. Consider the group of IQ scores that are unusual. What are the z scores that separate the... more
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03/18/21

Does the range rule of thumb produce an acceptable​ approximation? Suppose a researcher deems the approximation as acceptable if it has an error less than​ 15%.
Below are the range and standard deviation for a set of data. Use the range rule of thumb and compare it to the standard deviation listed below. Does the range rule of thumb produce an acceptable​... more
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03/18/21

Does the range rule of thumb produce an acceptable​ approximation? Suppose a researcher deems the approximation as acceptable if it has an error less than​ 15%.
Below are the range and standard deviation for a set of data. Use the range rule of thumb and compare it to the standard deviation listed below. Does the range rule of thumb produce an acceptable​... more
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03/18/21

Does the range rule of thumb produce an acceptable​ approximation? Suppose a researcher deems the approximation as acceptable if it has an error less than​ 15%.
Below are the range and standard deviation for a set of data. Use the range rule of thumb and compare it to the standard deviation listed below. Does the range rule of thumb produce an acceptable​... more
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03/18/21

Does the range rule of thumb produce an acceptable​ approximation? Suppose a researcher deems the approximation as acceptable if it has an error less than​ 15%.
Below are the range and standard deviation for a set of data. Use the range rule of thumb and compare it to the standard deviation listed below. Does the range rule of thumb produce an acceptable​... more
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03/18/21

Does the range rule of thumb produce an acceptable​ approximation? Suppose a researcher deems the approximation as acceptable if it has an error less than​ 15%.
Below are the range and standard deviation for a set of data. Use the range rule of thumb and compare it to the standard deviation listed below. Does the range rule of thumb produce an acceptable​... more
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03/18/21

Does the range rule of thumb produce an acceptable​ approximation? Suppose a researcher deems the approximation as acceptable if it has an error less than​ 15%.
Below are the range and standard deviation for a set of data. Use the range rule of thumb and compare it to the standard deviation listed below. Does the range rule of thumb produce an acceptable​... more
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