A sportswriter wants to know how strongly Albuquer- que residents support the local minor league baseball
team, the Isotopes. She stands outside the stadium
before a game and interviews the first 20 people who
enter the stadium, asking them to rate their enthusi-
asm for the team on a 1 (lowest) to 5 (highest) scale.
Which of the following best describes the results of
this survey?
(a) Because this is a random sample, there will be some
sampling variability, but we can expect it to produce
quite accurate results.
(b) This is a random sample, but the size of the sample is
too small to produce reliable results.
(c) This is a voluntary response sample and is likely to
underestimate support for the team.
(d) This is a convenience sample and is likely to overesti-
mate the level of support for the team.