Final answer:
Without specific data, we can't determine the exact percentage of people who've attended more than 10 NFL games. Representative sampling or ticket data analysis is necessary. Biased survey methods, like certain TV program polls, are inadequate for obtaining accurate statistics.
Step-by-step explanation:
The question does not provide specific data on the percentage of people who have attended more than 10 NFL games. However, by analyzing trends and conducting surveys similar to the examples given, researchers could estimate this percentage. For example, a national survey might be conducted like the one where 95 percent confidence concluded that 49 percent to 55 percent of Americans believe college sports programs corrupt education. Another approach might be to consider the intensity of fandom in areas with high football team success, and extrapolate the likelihood of frequent game attendance in such regions.
To obtain an accurate figure, it would be necessary to survey a representative sample of NFL fans or analyze ticket sales data. Biased methods, such as the television program poll, would not yield reliable statistics because they do not represent the complete range of football fans.