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Exploration 4.1 Home Court Disadvantage? 105
Exploration 4.1
Home Court Disadvantage?
Sports teams prefer to play in front of their own fans rather than at the opposing team’s site.
Having a sell-out crowd should provide even more excitement and lead to an even better
performance, right? Well, consider the Oklahoma City Thunder, a National Basketball Associ-
ation (NBA) team, in its second season (2008–2009) after moving from Seattle. This team had
a win–loss record that was actually worse for home games with a sell-out crowd (3 wins and
15 losses) than for home games without a sell-out crowd (12 wins and 11 losses). (These data
were noted in the April 20, 2009, issue of Sports Illustrated in the Go Figure column.)
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1. Identify the observational units and variables in this study. Also classify each variable as
categorical (also binary?) or quantitative.
2. When did the Thunder have a higher winning percentage: in front of a sell-out crowd or
a smaller crowd? Support your answer by calculating the proportion of sell-out games
that they won and also the proportion of non-sell-out games that they won. (Write both
these proportions as decimals.)
3. Do the two variables appear to be associated?
.