If the target population is all U.S. adults, then a telephone ...

[panfilo]

If the target population is all U.S. adults, then a telephone directory would not make a good sampling frame because
 a. people with unlisted numbers or no phones are not included.
  b. not everyone can understand English.
  c. some people have more than one phone number.
  d. some people will not answer their phone.

Question 2

Which of the following would be most likely to produce selection bias in a survey?
 a. Using questions with biased wording.
  b. Only receiving responses from half of the people in the sample.
  c. Conducting interviews by telephone instead of in person.
  d. Using a random sample of students at a university to estimate the proportion of people who think the legal drinking age should be lowered.

[juwms]

Answer to Question 1

A

Answer to Question 2

D

[panfilo]

Both answers were spot on, thank you once again

[juwms]

Great! Please up vote