Identify whether the following is a voluntary response sample or convenience sample.
a. The BBC in Britain requested viewers to call the network and indicate their favorite poem
b. A politician asks his neighbors their opinions about a controversial issue.
c. Priceline. com randomly e-mails a Customer Satisfaction Survey for certain transactions done on its site in
which customers choose to either respond or not.
d. A soap company distributed free samples of a new laundry detergent to all households in several
randomly selected neighborhoods. The company requested the recipients to return a postage-paid
card indicating whether they thought the sample was better than their usual detergent.
e. A professor asks the first 5 students who arrive to class to participate in a research study about young
adult sleep patterns.
f. Selecting the first 25 people arriving at an 11 a. m. movie on a Tuesday to ask about their favorite movie
genre.
g. A TV show host asks his viewers to visit his website and respond to an online poll.
h. A researcher polls people as they walk by on the street.
i. A restaurant leaves comment cards on all of its tables to learn about customer satisfaction. Each
comment card is a brief survey that customers can fill out if they choose to.
j. A store prints a request on each receipt asking customers to fill out a satisfaction survey online if they are
willing.
k. A support hotline asks callers to stay on the line after they have completed their call to respond to a
short survey.
l. Student organization looking to get signatures for a petition camp out in front of Town Center Mall
m. A community college student interviews everyone in their biology class to determine the percentage of
students that own a car.
n. To avoid working late, the quality control manager inspects the last 10 items produced that day.
o. To get reactions about a particular new car, readers of a car magazine were asked to mail in their
answers to a survey
p. A television reporter interviewed travelers stranded at an airport during a snowstorm about the
efficiency of air travel in Canada.
q. A quality control worker at a factory selects the first 10 items she sees as her sample for the day.