Homework 1.1
1.When testing a new treatment, what is the difference between statistical significance and
practical significance? Can a treatment have statistical significance, but not practical
significance?
A. Statistical significance is achieved when the result is very unlikely to occur by chance.
Practical significance is related to whether common sense suggests that the treatment makes
enough of a difference to justify its use. It is not possible for a treatment to have statistical
significance, but not practical significance.
B. Statistical significance is related to whether common sense suggests that the treatment makes
enough of a difference to justify its use. Practical significance is achieved when the result is very
unlikely to occur by chance. It is possible for a treatment to have statistical significance, but not
practical significance.
C. Statistical significance is achieved when the result is very unlikely to occur by chance.
Practical significance is related to whether common sense suggests that the treatment makes
enough of a difference to justify its use. It is possible for a treatment to have statistical
significance, but not practical significance.
Your answer is correct.
D. Statistical significance is related to whether common sense suggests that the treatment makes
enough of a difference to justify its use. Practical significance is achieved when the result is very
unlikely to occur by chance. It is not possible for a treatment to have statistical significance, but
not practical significance.
2.Determine whether the sampling method described below appears to be sound or is flawed.
In a survey of 538 human resource professionals, each was asked about the importance of the
experience of a job applicant. The survey subjects were randomly selected by pollsters from a
reputable market research firm.
A. It is flawed because it is a voluntary response sample.
B. It appears to be sound because the data are not biased in any way.
Your answer is correct.
C. It is flawed because it is not statistically significant.
D. It is flawed because it is a census.
3.A magazine ran a survey about a web site for downloading music. Readers could register their
responses on the magazine's web site.
Identify what is wrong.
A.The sample is a voluntary response sample, so there is a good chance that the results do not
reflect the population.
Your answer is correct.
B. It is likely that the survey used a loaded question, so the results of the survey are not reliable.
C. The magazine has an interest in the survey results, so the source of the survey is questionable.
D. The sample is a census, so there is a good chance that the results do not reflect the population.
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, 4.Survey questions may be misleading if they are "loaded." To what does "loaded" refer?
Choose the correct answer below.
A.Not concise; very long drawn out questions
B. Too much data
C. Intentionally worded to elicit a desired response
Your answer is correct.
D. Questions that trigger a nonresponse
5.Fill in the blank to complete the statement below.
The _________________ is/are the entire group of individuals or items being studied.
The population is/are the entire group of individuals or items being studied.
6.Fill in the blank to complete the statement below.
The _________________ is/are a subset of the population that is being studied.
The sample is/are a subset of the population that is being studied.
Homework 1.2
1.Fill in the blank to complete the statement below.
A _________________ is a numerical measurement describing some characteristic of a
population.
A parameter is a numerical measurement describing some characteristic of a population.
2. Fill in the blank to complete the statement below.
A _________________ is a numerical measurement describing some characteristic of a sample.
A statistic is a numerical measurement describing some characteristic of a sample.
3. Determine whether the given value is a statistic or a parameter.
In a study of all 1806 students at a college comma it is found that 25 % own a vehicle.
A.Parameter because the value is a numerical measurement describing a characteristic of a
population.
Your answer is correct.
B. Statistic because the value is a numerical measurement describing a characteristic of a sample.
C. Parameter because the value is a numerical measurement describing a characteristic of a
sample.
D. Statistic because the value is a numerical measurement describing a characteristic of a
population.
4. Determine whether the data described below are qualitative or quantitative and explain why.
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1.When testing a new treatment, what is the difference between statistical significance and
practical significance? Can a treatment have statistical significance, but not practical
significance?
A. Statistical significance is achieved when the result is very unlikely to occur by chance.
Practical significance is related to whether common sense suggests that the treatment makes
enough of a difference to justify its use. It is not possible for a treatment to have statistical
significance, but not practical significance.
B. Statistical significance is related to whether common sense suggests that the treatment makes
enough of a difference to justify its use. Practical significance is achieved when the result is very
unlikely to occur by chance. It is possible for a treatment to have statistical significance, but not
practical significance.
C. Statistical significance is achieved when the result is very unlikely to occur by chance.
Practical significance is related to whether common sense suggests that the treatment makes
enough of a difference to justify its use. It is possible for a treatment to have statistical
significance, but not practical significance.
Your answer is correct.
D. Statistical significance is related to whether common sense suggests that the treatment makes
enough of a difference to justify its use. Practical significance is achieved when the result is very
unlikely to occur by chance. It is not possible for a treatment to have statistical significance, but
not practical significance.
2.Determine whether the sampling method described below appears to be sound or is flawed.
In a survey of 538 human resource professionals, each was asked about the importance of the
experience of a job applicant. The survey subjects were randomly selected by pollsters from a
reputable market research firm.
A. It is flawed because it is a voluntary response sample.
B. It appears to be sound because the data are not biased in any way.
Your answer is correct.
C. It is flawed because it is not statistically significant.
D. It is flawed because it is a census.
3.A magazine ran a survey about a web site for downloading music. Readers could register their
responses on the magazine's web site.
Identify what is wrong.
A.The sample is a voluntary response sample, so there is a good chance that the results do not
reflect the population.
Your answer is correct.
B. It is likely that the survey used a loaded question, so the results of the survey are not reliable.
C. The magazine has an interest in the survey results, so the source of the survey is questionable.
D. The sample is a census, so there is a good chance that the results do not reflect the population.
This study source was downloaded by 100000831525611 from CourseHero.com on 02-07-2022 14:58:19 GMT -06:00
https://www.coursehero.com/file/34478861/Homework-Chapter-1docx/
, 4.Survey questions may be misleading if they are "loaded." To what does "loaded" refer?
Choose the correct answer below.
A.Not concise; very long drawn out questions
B. Too much data
C. Intentionally worded to elicit a desired response
Your answer is correct.
D. Questions that trigger a nonresponse
5.Fill in the blank to complete the statement below.
The _________________ is/are the entire group of individuals or items being studied.
The population is/are the entire group of individuals or items being studied.
6.Fill in the blank to complete the statement below.
The _________________ is/are a subset of the population that is being studied.
The sample is/are a subset of the population that is being studied.
Homework 1.2
1.Fill in the blank to complete the statement below.
A _________________ is a numerical measurement describing some characteristic of a
population.
A parameter is a numerical measurement describing some characteristic of a population.
2. Fill in the blank to complete the statement below.
A _________________ is a numerical measurement describing some characteristic of a sample.
A statistic is a numerical measurement describing some characteristic of a sample.
3. Determine whether the given value is a statistic or a parameter.
In a study of all 1806 students at a college comma it is found that 25 % own a vehicle.
A.Parameter because the value is a numerical measurement describing a characteristic of a
population.
Your answer is correct.
B. Statistic because the value is a numerical measurement describing a characteristic of a sample.
C. Parameter because the value is a numerical measurement describing a characteristic of a
sample.
D. Statistic because the value is a numerical measurement describing a characteristic of a
population.
4. Determine whether the data described below are qualitative or quantitative and explain why.
This study source was downloaded by 100000831525611 from CourseHero.com on 02-07-2022 14:58:19 GMT -06:00
https://www.coursehero.com/file/34478861/Homework-Chapter-1docx/
