Question

An organization that studies the use of the Internet in America surveyed 802 pairs of parents and teens​ (aged 12–​17)using​ in-person interviews. Using the​ teens' responses, they report that 89% of teens have access to a computer. 32 of teens access the Internet primarily on their cell phone rather than on a computer. Identify the following items ​(if possible) in parts a through f below. If you​ can't tell, then say so–this often happens when we read about a survey.

​a) The population. Choose the correct answer below.

A.Parents of U.S. teenagers

B.Teenagers and their parents

C.U.S. teenagers

D.Internet users in America

​b) The population parameter of interest. Choose the correct answer below.

A.The proportion who have access to computers

B.The average time spent on the Internet with a computer and with a cell phone

C.The proportion who have access to computers and the proportion who primarily access the Internet by cell phone

D.The proportion who primarily access the Internet by cell phone

​c) The sampling frame. Choose the correct answer below.

A.All teens​ (aged 12 to​ 17)

B.Teenagers with cell phones and computers

C.All teens with parents who browse the Internet

D.Not​ possible; the sampling frame is never specified

​d) The sample. Choose the correct answer below.

A.802 teens and parents

B.The 89% of teens who have access to a computer and their parents.

C.The 32% of teens who access the Internet primarily on their cell phone

D.Not​ possible; the sample is never specified

​e) The sampling​ method, including whether or not randomization was employed. Choose the correct answer below.

A.Voluntary response where a randomly chosen subset of the responses were used

B.Systematic sampling where every tenth teen on the list of all​ teenagers, no randomization employed

C.Voluntary response without the use of randomization

D.Not​ possible; the sampling method is unknown.

​f) Any potential sources of bias you can detect and any problems you see in generalizing to the population of interest. Choose the correct answer below.

A.Pairing teens with parents may be a source of response bias as the responders may edit their responses to please their parents.

B.Voluntary response bias resulted from answers only coming from responders who wanted to voice their​ opinion, which is not representative of the population.

C.Nonresponse bias resulted from the people who opted out of the​ survey, which was delivered via the Internet and therefore would only include Internet users.

D.Not​ possible; no bias can be detected in the statement given.

Answer 1

a. The population

The correct option is option B. Teenagers and their parents.

b. The population parameter of interest.

The correct option is option C. The proportion who have access to computers and the proportion who primarily access the internet by cell phone.

c. The sampling frame.

The correct option is option D. Not possible. The sampling frame is never specified.

d. The sample.

The correct option is option A. 802 parents and teens.

e. The sampling method , including whether or not randomization was employed.

The correct option is option D. Not possible. The sampling method is unknown.

f. Any potential sourcesof bias you can detect and any problems you see in generalizing to the population of interest.

The correct option is option A. Pairing teens with parents may be a source of response bias as the responders may edit their responses to please their parents.