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shown in the table. Based on the information in the table, is there an association between the variables? Explain your reasoning.
Solution
Sample response: There appears to be an association between the variables. Since the teams with animal mascots win 74% of their games played and those with another type of mascot only win 49% of their games, the large di erence suggests an association.
Problem Statement
An automobile dealership keeps track of the number of cars and trucks they have for sale as well as whether they are new or used. Based on the data, does there appear to be an association between the type of automobile and whether it is new or used? Explain your reasoning.
Solution
Sample response: There appears to be an association between the variables. About 66% of the cars at this dealership are new, but about 82% of the trucks at this dealership are new. The much greater percentage of trucks that are new appears to suggest a relationship.
Problem Statement
A random selection of indoor and outdoor pools are surveyed about the number of people in each age group that swim there. Results from the survey are displayed in the two-way table. Based on the data, does there appear to be an association between pool type and age group? Explain your reasoning.
animal mascot
other type of mascot
wins
74%
49%
losses
26%
51%
car
truck
new
812
233
used
422
51
outdoor pool
indoor pool
younger than 18
317
41
18 or older
352
163
44
Teacher Guide Algebra
