227 Answered Questions for the topic Stats

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

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

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

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

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

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

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

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

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

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

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

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

03/18/21

A certain group of test subjects had pulse rates with a mean of 80.1 beats per minute and a standard deviation of 10.5 beats per minute.

A certain group of test subjects had pulse rates with a mean of 80.1 beats per minute and a standard deviation of 10.5 beats per minute. Would it be unusual for one of the test subjects to have a... more

03/18/21

A certain group of test subjects had pulse rates with a mean of 80.1 beats per minute and a standard deviation of 10.5 beats per minute.

A certain group of test subjects had pulse rates with a mean of 80.1 beats per minute and a standard deviation of 10.5 beats per minute. Would it be unusual for one of the test subjects to have a... more

03/18/21

Cans of regular soda have volumes with a mean of 13.41 oz and a standard deviation of 0.12 oz. Is it unusual for a can to contain 13.49 oz of​ soda?

Cans of regular soda have volumes with a mean of 13.41 oz and a standard deviation of 0.12 oz. Is it unusual for a can to contain 13.49 oz of​ soda?Maximum​ "usual" value= ______ oz​(Type an... more
Stats Statistics

03/15/21

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
Stats Statistics

03/15/21

Cans of regular soda have volumes with a mean of 13.41 oz and a standard deviation of 0.12 oz. Is it unusual for a can to contain 13.49 oz of​ soda?

Cans of regular soda have volumes with a mean of 13.41 oz and a standard deviation of 0.12 oz. Is it unusual for a can to contain 13.49 oz of​ soda?Minimum​ "usual" value= _____ oz
Stats Statistics

03/15/21

Cans of regular soda have volumes with a mean of 13.41 oz and a standard deviation of 0.12 oz. Is it unusual for a can to contain 13.49 oz of​ soda?

Cans of regular soda have volumes with a mean of 13.41 oz and a standard deviation of 0.12 oz. Is it unusual for a can to contain 13.49 oz of​ soda?Minimum​ "usual" value= _____ oz
Stats Statistics

03/15/21

Minimum​ "usual" value= ________ beats per minute ​(Type an integer or a​ decimal.)

A certain group of test subjects had pulse rates with a mean of 80.1 beats per minute and a standard deviation of 10.5 beats per minute. Would it be unusual for one of the test subjects to have a... more

03/15/21

The estimated standard deviation is ________.

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... more

Can you interpret a confidence interval without knowing the population mean?

If we don't know the population mean, could we still make a precise interpretation of the confidence interval? For example, would we still be able to say that there is a 90% chance that the... more

12/05/20

Research statistics question

I’m a research student and I have to do a statistical test for this project in SPSS. Basically I had people take three surveys that were scored, and I’m trying to see if there is a difference... more

05/10/20

suppose 20 individuals are randomly selected from a large population of voters of which 40% are democrats. what are the probabilities that:

a) exactly 10 of the selected voters are democrats?b) at least 10 are democrats?c) at most 10 are democrats?d) between 8 and 12, inclusive are democrats?e) how many of the voters selected could we... more

Regression Help

The following table gives information on the amount of sugar (in grams) and the calorie count inone serving of a sample of 13 varieties of Kellogg’s cereal. Sugar... more

The answer is 502.4 ml. How to get the answer?

A company making cans for lemonade wishes to print ‘Average content x ml’ on their cans, and to be 99% confident that the true mean volume is greater than x ml. The volume of lemonade in a can is... more

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