The age of the stadium can be appealing if the stadium is rich with history, or if it is new and equipped with the most modern features. However, middle-aged stadiums may have neither appeal and could result in depressed attendance figures. The number of wins that the team has in the season impacts fan interest, as does the team's salary (which is a good way to operationalize a team's star power).

Each of these variables is already quantified, so is fully operationalized. This avoids the trap of using spurious proxies in a study. There are three possible outcomes that can result from this research. The null hypothesis can be proven within significant confidence limits or it may be disproved. The third option is that the null hypothesis may be proven, but there is reason to suspect that some of the variables are closely related to one another and that this...
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