You Wish to Survey the Students at Your College to Determine

Multiple Choice

You wish to survey the students at your college to determine their feelings about the quality of services in the student center. Which of the following sampling designs is best for avoiding bias?

A) Place an ad in the student newspaper asking all readers to mail in their opinions.
B) Obtain a list of student names from the registrar and select 250 names to contact.
C) Air an announcement on the campus radio station asking all listeners to phone in their opinions.
D) Survey every 10th student who enters the student center.