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TABLE 15-9
Many factors determine the attendance at Major League Baseball games. These factors can include when the game is played, the weather, the opponent, whether or not the team is having a good season, and whether or not a marketing promotion is held. Data from 80 games of the Kansas City Royals for the following variables are collected.
ATTENDANCE = Paid attendance for the game
TEMP = High temperature for the day
WIN% = Team's winning percentage at the time of the game
OPWIN% = Opponent team's winning percentage at the time of the game WEEKEND - 1 if game played on Friday, Saturday or Sunday; 0 otherwise PROMOTION - 1 = if a promotion was held; 0 = if no promotion was held
The regression results using attendance as the dependent variable and the remaining five variables as the independent variables are presented below.
The coefficient of multiple determination ( R 2 j ) of each of the 5 predictors with all the other remaining predictors are,
respectively, 0.2675, 0.3101, 0.1038, 0.7325, and 0.7308
-Referring to Table 15-9, there is reason to suspect collinearity between some pairs of predictors.
Sample Size
The number of individual observations or units included in a sample from a population, affecting the precision of the study's estimates.
Alternative Hypothesis
A statement that contradicts the null hypothesis and asserts that there is a statistically significant difference between groups or variables.
Republican Voters
Individuals who are registered or typically vote for candidates of the Republican Party in the United States.
Population Proportion
The fraction or percentage of a population that possesses a specified characteristic or attribute.
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