1..A newspaper posted this question on itswebsite: "How often do you seek medical informationonline?" Of 1072 Internet users who chose torespond, 38% of them responded with"frequently." What term is used to describe this type of survey in which the people surveyed consist of those who decided torespond? What is wrong with this type of samplingmethod?

a..The respondents are aself-selected sample.

b..The respondents are a census.

c...The respondents are a voluntary response sample.

d...The respondents are a population.

2..When testing a newtreatment, what is the difference between statistical significance and practicalsignificance? Can a treatment have statisticalsignificance, but not practicalsignificance?

Choose the correct answer below.

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 possible for a treatment to have statisticalsignificance, 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 not possible for a treatment to have statisticalsignificance, 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 not possible for a treatment to have statisticalsignificance, but not practical significance.

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 possible for a treatment to have statisticalsignificance, but not practical significance.

3...Determine whether the source given below has the potential to create a bias in a statistical study.

A certain medical organization tends to oppose the use of meat and dairy products in ourdiets, and that organization has received hundreds of thousands of dollars in funding from an animal rights foundation.

Choose the correct answer below.

A.

There does appear to be a potential to create a bias. There is an incentive to produce results that are in line with theorganization's creed and that of its funders.

B.

There does not appear to be a potential to create a bias. The organization would not gain from putting spin on the results.

C.

There does not appear to be a potential to create a bias. The organization is reputable and has many professional and credible members.

D.

There does appear to be a potential to create a bias. There is an incentive to make the results statistically insignifican

4...Determine whether the source given below has the potential to create a bias in a statistical study.

Washington University obtained word counts from the most popular novels of the past five years.

Choose the correct answer below.

A.

There does not appear to be a potential to create a bias. The organization is reputable and has many professional and credible members.

B.

There does appear to be a potential to create a bias. There is an incentive to produce results that are in line with theorganization's creed and that of its funders.

C.

There does not appear to be a potential to create a bias. The organization would not gain from putting a spin on the results.

D.

There does appear to be a potential to create a bias. There is an incentive to make the results statistically insignificant.

5..Several studies showed that afteraccessingtheinternetforschoolwork, subjects had an increasein grades. A broadbandinternetprovider financed this research. Identify what is wrong.

Choose the correct answer below.

A.

The data used in the studies is not reliable because it was not measured by the administrator.

B.

It is not possible to take accurate measurements.

C.

Since the research is composed of voluntary responsesamples, there may be key data points missing.

D.

It is questionable that the sponsor is a broadbandinternetprovider because this sponsor can be greatly affected by the conclusion

6..What does it mean for the findings of a statistical analysis of data to be statisticallysignificant?

Choose the correct answer below.

A.

The outcome could easily occur by chance.

B.

The likelihood of getting these results by chance is very small.

C.

The results are very important to the health andwell-being of a certain population.

D.

The results do not make enough difference to be of use.

7...Survey questions may be misleading if they are"loaded." To what does"loaded" refer?

Choose the correct answer below.

A.

Too much data

B.

Intentionally worded to elicit a desired response

C.

Questions that trigger a nonresponse

D.

Notconcise; very long drawn out questions