Tammy Wants to Do a Telephone Survey and She Turns

Multiple Choice

Tammy wants to do a telephone survey and she turns to you for help. Which of the following statements would mislead her?

A) Cell phone numbers are typically not included in phone surveys.
B) People who use cell phones exclusively tend to be younger.
C) There is a class bias in using telephone directory samples.
D) Telephone directories are an excellent listing of a city's population.
E) Unlisted numbers are not included in telephone directories.